diff --git a/services/certificates/api_default_test.go b/services/certificates/api_default_test.go
index 024c12f19..1272927c4 100644
--- a/services/certificates/api_default_test.go
+++ b/services/certificates/api_default_test.go
@@ -24,14 +24,14 @@ import (
 func Test_certificates_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService CreateCertificate", func(t *testing.T) {
-		path := "/v2beta/projects/{projectId}/regions/{region}/certificates"
+		_apiUrlPath := "/v2beta/projects/{projectId}/regions/{region}/certificates"
 		projectIdValue := "projectId"
-		path = strings.Replace(path, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 		regionValue := "region"
-		path = strings.Replace(path, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
-		testDefaultApiServeMux.HandleFunc(path, func(w http.ResponseWriter, req *http.Request) {
+		testDefaultApiServeMux.HandleFunc(_apiUrlPath, func(w http.ResponseWriter, req *http.Request) {
 			data := CreateCertificateResponse{}
 			w.Header().Add("Content-Type", "application/json")
 			json.NewEncoder(w).Encode(data)
@@ -65,8 +65,8 @@ func Test_certificates_DefaultApiService(t *testing.T) {
 			t.Fatalf("creating API client: %v", err)
 		}
 
-		projectId := "projectId"
-		region := "region"
+		projectId := projectIdValue
+		region := regionValue
 		createCertificatePayload := CreateCertificatePayload{}
 
 		resp, reqErr := apiClient.CreateCertificate(context.Background(), projectId, region).CreateCertificatePayload(createCertificatePayload).Execute()
@@ -74,22 +74,22 @@ func Test_certificates_DefaultApiService(t *testing.T) {
 		if reqErr != nil {
 			t.Fatalf("error in call: %v", reqErr)
 		}
-		if resp == nil {
+		if IsNil(resp) {
 			t.Fatalf("response not present")
 		}
 	})
 
 	t.Run("Test DefaultApiService DeleteCertificate", func(t *testing.T) {
-		path := "/v2beta/projects/{projectId}/regions/{region}/certificates/{id}"
+		_apiUrlPath := "/v2beta/projects/{projectId}/regions/{region}/certificates/{id}"
 		projectIdValue := "projectId"
-		path = strings.Replace(path, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 		regionValue := "region"
-		path = strings.Replace(path, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
 		idValue := "id"
-		path = strings.Replace(path, "{"+"id"+"}", url.PathEscape(ParameterValueToString(idValue, "id")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"id"+"}", url.PathEscape(ParameterValueToString(idValue, "id")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
-		testDefaultApiServeMux.HandleFunc(path, func(w http.ResponseWriter, req *http.Request) {
+		testDefaultApiServeMux.HandleFunc(_apiUrlPath, func(w http.ResponseWriter, req *http.Request) {
 			data := map[string]interface{}{}
 			w.Header().Add("Content-Type", "application/json")
 			json.NewEncoder(w).Encode(data)
@@ -123,31 +123,31 @@ func Test_certificates_DefaultApiService(t *testing.T) {
 			t.Fatalf("creating API client: %v", err)
 		}
 
-		projectId := "projectId"
-		region := "region"
-		id := "id"
+		projectId := projectIdValue
+		region := regionValue
+		id := idValue
 
 		resp, reqErr := apiClient.DeleteCertificate(context.Background(), projectId, region, id).Execute()
 
 		if reqErr != nil {
 			t.Fatalf("error in call: %v", reqErr)
 		}
-		if resp == nil {
+		if IsNil(resp) {
 			t.Fatalf("response not present")
 		}
 	})
 
 	t.Run("Test DefaultApiService GetCertificate", func(t *testing.T) {
-		path := "/v2beta/projects/{projectId}/regions/{region}/certificates/{id}"
+		_apiUrlPath := "/v2beta/projects/{projectId}/regions/{region}/certificates/{id}"
 		projectIdValue := "projectId"
-		path = strings.Replace(path, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 		regionValue := "region"
-		path = strings.Replace(path, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
 		idValue := "id"
-		path = strings.Replace(path, "{"+"id"+"}", url.PathEscape(ParameterValueToString(idValue, "id")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"id"+"}", url.PathEscape(ParameterValueToString(idValue, "id")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
-		testDefaultApiServeMux.HandleFunc(path, func(w http.ResponseWriter, req *http.Request) {
+		testDefaultApiServeMux.HandleFunc(_apiUrlPath, func(w http.ResponseWriter, req *http.Request) {
 			data := GetCertificateResponse{}
 			w.Header().Add("Content-Type", "application/json")
 			json.NewEncoder(w).Encode(data)
@@ -181,29 +181,29 @@ func Test_certificates_DefaultApiService(t *testing.T) {
 			t.Fatalf("creating API client: %v", err)
 		}
 
-		projectId := "projectId"
-		region := "region"
-		id := "id"
+		projectId := projectIdValue
+		region := regionValue
+		id := idValue
 
 		resp, reqErr := apiClient.GetCertificate(context.Background(), projectId, region, id).Execute()
 
 		if reqErr != nil {
 			t.Fatalf("error in call: %v", reqErr)
 		}
-		if resp == nil {
+		if IsNil(resp) {
 			t.Fatalf("response not present")
 		}
 	})
 
 	t.Run("Test DefaultApiService ListCertificates", func(t *testing.T) {
-		path := "/v2beta/projects/{projectId}/regions/{region}/certificates"
+		_apiUrlPath := "/v2beta/projects/{projectId}/regions/{region}/certificates"
 		projectIdValue := "projectId"
-		path = strings.Replace(path, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 		regionValue := "region"
-		path = strings.Replace(path, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
+		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
-		testDefaultApiServeMux.HandleFunc(path, func(w http.ResponseWriter, req *http.Request) {
+		testDefaultApiServeMux.HandleFunc(_apiUrlPath, func(w http.ResponseWriter, req *http.Request) {
 			data := ListCertificatesResponse{}
 			w.Header().Add("Content-Type", "application/json")
 			json.NewEncoder(w).Encode(data)
@@ -237,15 +237,15 @@ func Test_certificates_DefaultApiService(t *testing.T) {
 			t.Fatalf("creating API client: %v", err)
 		}
 
-		projectId := "projectId"
-		region := "region"
+		projectId := projectIdValue
+		region := regionValue
 
 		resp, reqErr := apiClient.ListCertificates(context.Background(), projectId, region).Execute()
 
 		if reqErr != nil {
 			t.Fatalf("error in call: %v", reqErr)
 		}
-		if resp == nil {
+		if IsNil(resp) {
 			t.Fatalf("response not present")
 		}
 	})
diff --git a/services/certificates/model_create_certificate_payload.go b/services/certificates/model_create_certificate_payload.go
index c9e4f87eb..47ca094c6 100644
--- a/services/certificates/model_create_certificate_payload.go
+++ b/services/certificates/model_create_certificate_payload.go
@@ -17,18 +17,123 @@ import (
 // checks if the CreateCertificatePayload type satisfies the MappedNullable interface at compile time
 var _ MappedNullable = &CreateCertificatePayload{}
 
+/*
+	types and functions for name
+*/
+
+// isNotNullableString
+type CreateCertificatePayloadGetNameAttributeType = *string
+
+func getCreateCertificatePayloadGetNameAttributeTypeOk(arg CreateCertificatePayloadGetNameAttributeType) (ret CreateCertificatePayloadGetNameRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setCreateCertificatePayloadGetNameAttributeType(arg *CreateCertificatePayloadGetNameAttributeType, val CreateCertificatePayloadGetNameRetType) {
+	*arg = &val
+}
+
+type CreateCertificatePayloadGetNameArgType = string
+type CreateCertificatePayloadGetNameRetType = string
+
+/*
+	types and functions for privateKey
+*/
+
+// isNotNullableString
+type CreateCertificatePayloadGetPrivateKeyAttributeType = *string
+
+func getCreateCertificatePayloadGetPrivateKeyAttributeTypeOk(arg CreateCertificatePayloadGetPrivateKeyAttributeType) (ret CreateCertificatePayloadGetPrivateKeyRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setCreateCertificatePayloadGetPrivateKeyAttributeType(arg *CreateCertificatePayloadGetPrivateKeyAttributeType, val CreateCertificatePayloadGetPrivateKeyRetType) {
+	*arg = &val
+}
+
+type CreateCertificatePayloadGetPrivateKeyArgType = string
+type CreateCertificatePayloadGetPrivateKeyRetType = string
+
+/*
+	types and functions for projectId
+*/
+
+// isNotNullableString
+type CreateCertificatePayloadGetProjectIdAttributeType = *string
+
+func getCreateCertificatePayloadGetProjectIdAttributeTypeOk(arg CreateCertificatePayloadGetProjectIdAttributeType) (ret CreateCertificatePayloadGetProjectIdRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setCreateCertificatePayloadGetProjectIdAttributeType(arg *CreateCertificatePayloadGetProjectIdAttributeType, val CreateCertificatePayloadGetProjectIdRetType) {
+	*arg = &val
+}
+
+type CreateCertificatePayloadGetProjectIdArgType = string
+type CreateCertificatePayloadGetProjectIdRetType = string
+
+/*
+	types and functions for publicKey
+*/
+
+// isNotNullableString
+type CreateCertificatePayloadGetPublicKeyAttributeType = *string
+
+func getCreateCertificatePayloadGetPublicKeyAttributeTypeOk(arg CreateCertificatePayloadGetPublicKeyAttributeType) (ret CreateCertificatePayloadGetPublicKeyRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setCreateCertificatePayloadGetPublicKeyAttributeType(arg *CreateCertificatePayloadGetPublicKeyAttributeType, val CreateCertificatePayloadGetPublicKeyRetType) {
+	*arg = &val
+}
+
+type CreateCertificatePayloadGetPublicKeyArgType = string
+type CreateCertificatePayloadGetPublicKeyRetType = string
+
+/*
+	types and functions for region
+*/
+
+// isNotNullableString
+type CreateCertificatePayloadGetRegionAttributeType = *string
+
+func getCreateCertificatePayloadGetRegionAttributeTypeOk(arg CreateCertificatePayloadGetRegionAttributeType) (ret CreateCertificatePayloadGetRegionRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setCreateCertificatePayloadGetRegionAttributeType(arg *CreateCertificatePayloadGetRegionAttributeType, val CreateCertificatePayloadGetRegionRetType) {
+	*arg = &val
+}
+
+type CreateCertificatePayloadGetRegionArgType = string
+type CreateCertificatePayloadGetRegionRetType = string
+
 // CreateCertificatePayload Uploads a PEM encoded X509 public/private key pair
 type CreateCertificatePayload struct {
 	// TLS certificate name
-	Name *string `json:"name,omitempty"`
+	Name CreateCertificatePayloadGetNameAttributeType `json:"name,omitempty"`
 	// The PEM encoded private key part
-	PrivateKey *string `json:"privateKey,omitempty"`
+	PrivateKey CreateCertificatePayloadGetPrivateKeyAttributeType `json:"privateKey,omitempty"`
 	// Project identifier
-	ProjectId *string `json:"projectId,omitempty"`
+	ProjectId CreateCertificatePayloadGetProjectIdAttributeType `json:"projectId,omitempty"`
 	// The PEM encoded public key part
-	PublicKey *string `json:"publicKey,omitempty"`
+	PublicKey CreateCertificatePayloadGetPublicKeyAttributeType `json:"publicKey,omitempty"`
 	// Region
-	Region *string `json:"region,omitempty"`
+	Region CreateCertificatePayloadGetRegionAttributeType `json:"region,omitempty"`
 }
 
 // NewCreateCertificatePayload instantiates a new CreateCertificatePayload object
@@ -49,181 +154,136 @@ func NewCreateCertificatePayloadWithDefaults() *CreateCertificatePayload {
 }
 
 // GetName returns the Name field value if set, zero value otherwise.
-func (o *CreateCertificatePayload) GetName() *string {
-	if o == nil || IsNil(o.Name) {
-		var ret *string
-		return ret
-	}
-	return o.Name
+func (o *CreateCertificatePayload) GetName() (res CreateCertificatePayloadGetNameRetType) {
+	res, _ = o.GetNameOk()
+	return
 }
 
 // GetNameOk returns a tuple with the Name field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *CreateCertificatePayload) GetNameOk() (*string, bool) {
-	if o == nil || IsNil(o.Name) {
-		return nil, false
-	}
-	return o.Name, true
+func (o *CreateCertificatePayload) GetNameOk() (ret CreateCertificatePayloadGetNameRetType, ok bool) {
+	return getCreateCertificatePayloadGetNameAttributeTypeOk(o.Name)
 }
 
 // HasName returns a boolean if a field has been set.
 func (o *CreateCertificatePayload) HasName() bool {
-	if o != nil && !IsNil(o.Name) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetNameOk()
+	return ok
 }
 
 // SetName gets a reference to the given string and assigns it to the Name field.
-func (o *CreateCertificatePayload) SetName(v *string) {
-	o.Name = v
+func (o *CreateCertificatePayload) SetName(v CreateCertificatePayloadGetNameRetType) {
+	setCreateCertificatePayloadGetNameAttributeType(&o.Name, v)
 }
 
 // GetPrivateKey returns the PrivateKey field value if set, zero value otherwise.
-func (o *CreateCertificatePayload) GetPrivateKey() *string {
-	if o == nil || IsNil(o.PrivateKey) {
-		var ret *string
-		return ret
-	}
-	return o.PrivateKey
+func (o *CreateCertificatePayload) GetPrivateKey() (res CreateCertificatePayloadGetPrivateKeyRetType) {
+	res, _ = o.GetPrivateKeyOk()
+	return
 }
 
 // GetPrivateKeyOk returns a tuple with the PrivateKey field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *CreateCertificatePayload) GetPrivateKeyOk() (*string, bool) {
-	if o == nil || IsNil(o.PrivateKey) {
-		return nil, false
-	}
-	return o.PrivateKey, true
+func (o *CreateCertificatePayload) GetPrivateKeyOk() (ret CreateCertificatePayloadGetPrivateKeyRetType, ok bool) {
+	return getCreateCertificatePayloadGetPrivateKeyAttributeTypeOk(o.PrivateKey)
 }
 
 // HasPrivateKey returns a boolean if a field has been set.
 func (o *CreateCertificatePayload) HasPrivateKey() bool {
-	if o != nil && !IsNil(o.PrivateKey) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetPrivateKeyOk()
+	return ok
 }
 
 // SetPrivateKey gets a reference to the given string and assigns it to the PrivateKey field.
-func (o *CreateCertificatePayload) SetPrivateKey(v *string) {
-	o.PrivateKey = v
+func (o *CreateCertificatePayload) SetPrivateKey(v CreateCertificatePayloadGetPrivateKeyRetType) {
+	setCreateCertificatePayloadGetPrivateKeyAttributeType(&o.PrivateKey, v)
 }
 
 // GetProjectId returns the ProjectId field value if set, zero value otherwise.
-func (o *CreateCertificatePayload) GetProjectId() *string {
-	if o == nil || IsNil(o.ProjectId) {
-		var ret *string
-		return ret
-	}
-	return o.ProjectId
+func (o *CreateCertificatePayload) GetProjectId() (res CreateCertificatePayloadGetProjectIdRetType) {
+	res, _ = o.GetProjectIdOk()
+	return
 }
 
 // GetProjectIdOk returns a tuple with the ProjectId field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *CreateCertificatePayload) GetProjectIdOk() (*string, bool) {
-	if o == nil || IsNil(o.ProjectId) {
-		return nil, false
-	}
-	return o.ProjectId, true
+func (o *CreateCertificatePayload) GetProjectIdOk() (ret CreateCertificatePayloadGetProjectIdRetType, ok bool) {
+	return getCreateCertificatePayloadGetProjectIdAttributeTypeOk(o.ProjectId)
 }
 
 // HasProjectId returns a boolean if a field has been set.
 func (o *CreateCertificatePayload) HasProjectId() bool {
-	if o != nil && !IsNil(o.ProjectId) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetProjectIdOk()
+	return ok
 }
 
 // SetProjectId gets a reference to the given string and assigns it to the ProjectId field.
-func (o *CreateCertificatePayload) SetProjectId(v *string) {
-	o.ProjectId = v
+func (o *CreateCertificatePayload) SetProjectId(v CreateCertificatePayloadGetProjectIdRetType) {
+	setCreateCertificatePayloadGetProjectIdAttributeType(&o.ProjectId, v)
 }
 
 // GetPublicKey returns the PublicKey field value if set, zero value otherwise.
-func (o *CreateCertificatePayload) GetPublicKey() *string {
-	if o == nil || IsNil(o.PublicKey) {
-		var ret *string
-		return ret
-	}
-	return o.PublicKey
+func (o *CreateCertificatePayload) GetPublicKey() (res CreateCertificatePayloadGetPublicKeyRetType) {
+	res, _ = o.GetPublicKeyOk()
+	return
 }
 
 // GetPublicKeyOk returns a tuple with the PublicKey field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *CreateCertificatePayload) GetPublicKeyOk() (*string, bool) {
-	if o == nil || IsNil(o.PublicKey) {
-		return nil, false
-	}
-	return o.PublicKey, true
+func (o *CreateCertificatePayload) GetPublicKeyOk() (ret CreateCertificatePayloadGetPublicKeyRetType, ok bool) {
+	return getCreateCertificatePayloadGetPublicKeyAttributeTypeOk(o.PublicKey)
 }
 
 // HasPublicKey returns a boolean if a field has been set.
 func (o *CreateCertificatePayload) HasPublicKey() bool {
-	if o != nil && !IsNil(o.PublicKey) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetPublicKeyOk()
+	return ok
 }
 
 // SetPublicKey gets a reference to the given string and assigns it to the PublicKey field.
-func (o *CreateCertificatePayload) SetPublicKey(v *string) {
-	o.PublicKey = v
+func (o *CreateCertificatePayload) SetPublicKey(v CreateCertificatePayloadGetPublicKeyRetType) {
+	setCreateCertificatePayloadGetPublicKeyAttributeType(&o.PublicKey, v)
 }
 
 // GetRegion returns the Region field value if set, zero value otherwise.
-func (o *CreateCertificatePayload) GetRegion() *string {
-	if o == nil || IsNil(o.Region) {
-		var ret *string
-		return ret
-	}
-	return o.Region
+func (o *CreateCertificatePayload) GetRegion() (res CreateCertificatePayloadGetRegionRetType) {
+	res, _ = o.GetRegionOk()
+	return
 }
 
 // GetRegionOk returns a tuple with the Region field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *CreateCertificatePayload) GetRegionOk() (*string, bool) {
-	if o == nil || IsNil(o.Region) {
-		return nil, false
-	}
-	return o.Region, true
+func (o *CreateCertificatePayload) GetRegionOk() (ret CreateCertificatePayloadGetRegionRetType, ok bool) {
+	return getCreateCertificatePayloadGetRegionAttributeTypeOk(o.Region)
 }
 
 // HasRegion returns a boolean if a field has been set.
 func (o *CreateCertificatePayload) HasRegion() bool {
-	if o != nil && !IsNil(o.Region) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetRegionOk()
+	return ok
 }
 
 // SetRegion gets a reference to the given string and assigns it to the Region field.
-func (o *CreateCertificatePayload) SetRegion(v *string) {
-	o.Region = v
+func (o *CreateCertificatePayload) SetRegion(v CreateCertificatePayloadGetRegionRetType) {
+	setCreateCertificatePayloadGetRegionAttributeType(&o.Region, v)
 }
 
 func (o CreateCertificatePayload) ToMap() (map[string]interface{}, error) {
 	toSerialize := map[string]interface{}{}
-	if !IsNil(o.Name) {
-		toSerialize["name"] = o.Name
+	if val, ok := getCreateCertificatePayloadGetNameAttributeTypeOk(o.Name); ok {
+		toSerialize["Name"] = val
 	}
-	if !IsNil(o.PrivateKey) {
-		toSerialize["privateKey"] = o.PrivateKey
+	if val, ok := getCreateCertificatePayloadGetPrivateKeyAttributeTypeOk(o.PrivateKey); ok {
+		toSerialize["PrivateKey"] = val
 	}
-	if !IsNil(o.ProjectId) {
-		toSerialize["projectId"] = o.ProjectId
+	if val, ok := getCreateCertificatePayloadGetProjectIdAttributeTypeOk(o.ProjectId); ok {
+		toSerialize["ProjectId"] = val
 	}
-	if !IsNil(o.PublicKey) {
-		toSerialize["publicKey"] = o.PublicKey
+	if val, ok := getCreateCertificatePayloadGetPublicKeyAttributeTypeOk(o.PublicKey); ok {
+		toSerialize["PublicKey"] = val
 	}
-	if !IsNil(o.Region) {
-		toSerialize["region"] = o.Region
+	if val, ok := getCreateCertificatePayloadGetRegionAttributeTypeOk(o.Region); ok {
+		toSerialize["Region"] = val
 	}
 	return toSerialize, nil
 }
diff --git a/services/certificates/model_create_certificate_response.go b/services/certificates/model_create_certificate_response.go
index a2a756778..1bc5306e3 100644
--- a/services/certificates/model_create_certificate_response.go
+++ b/services/certificates/model_create_certificate_response.go
@@ -17,12 +17,54 @@ import (
 // checks if the CreateCertificateResponse type satisfies the MappedNullable interface at compile time
 var _ MappedNullable = &CreateCertificateResponse{}
 
+/*
+	types and functions for id
+*/
+
+// isNotNullableString
+type CreateCertificateResponseGetIdAttributeType = *string
+
+func getCreateCertificateResponseGetIdAttributeTypeOk(arg CreateCertificateResponseGetIdAttributeType) (ret CreateCertificateResponseGetIdRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setCreateCertificateResponseGetIdAttributeType(arg *CreateCertificateResponseGetIdAttributeType, val CreateCertificateResponseGetIdRetType) {
+	*arg = &val
+}
+
+type CreateCertificateResponseGetIdArgType = string
+type CreateCertificateResponseGetIdRetType = string
+
+/*
+	types and functions for region
+*/
+
+// isNotNullableString
+type CreateCertificateResponseGetRegionAttributeType = *string
+
+func getCreateCertificateResponseGetRegionAttributeTypeOk(arg CreateCertificateResponseGetRegionAttributeType) (ret CreateCertificateResponseGetRegionRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setCreateCertificateResponseGetRegionAttributeType(arg *CreateCertificateResponseGetRegionAttributeType, val CreateCertificateResponseGetRegionRetType) {
+	*arg = &val
+}
+
+type CreateCertificateResponseGetRegionArgType = string
+type CreateCertificateResponseGetRegionRetType = string
+
 // CreateCertificateResponse CreateCertificateResponse returns unique resource id
 type CreateCertificateResponse struct {
 	// The certificates resource id
-	Id *string `json:"id,omitempty"`
+	Id CreateCertificateResponseGetIdAttributeType `json:"id,omitempty"`
 	// Region
-	Region *string `json:"region,omitempty"`
+	Region CreateCertificateResponseGetRegionAttributeType `json:"region,omitempty"`
 }
 
 // NewCreateCertificateResponse instantiates a new CreateCertificateResponse object
@@ -43,76 +85,58 @@ func NewCreateCertificateResponseWithDefaults() *CreateCertificateResponse {
 }
 
 // GetId returns the Id field value if set, zero value otherwise.
-func (o *CreateCertificateResponse) GetId() *string {
-	if o == nil || IsNil(o.Id) {
-		var ret *string
-		return ret
-	}
-	return o.Id
+func (o *CreateCertificateResponse) GetId() (res CreateCertificateResponseGetIdRetType) {
+	res, _ = o.GetIdOk()
+	return
 }
 
 // GetIdOk returns a tuple with the Id field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *CreateCertificateResponse) GetIdOk() (*string, bool) {
-	if o == nil || IsNil(o.Id) {
-		return nil, false
-	}
-	return o.Id, true
+func (o *CreateCertificateResponse) GetIdOk() (ret CreateCertificateResponseGetIdRetType, ok bool) {
+	return getCreateCertificateResponseGetIdAttributeTypeOk(o.Id)
 }
 
 // HasId returns a boolean if a field has been set.
 func (o *CreateCertificateResponse) HasId() bool {
-	if o != nil && !IsNil(o.Id) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetIdOk()
+	return ok
 }
 
 // SetId gets a reference to the given string and assigns it to the Id field.
-func (o *CreateCertificateResponse) SetId(v *string) {
-	o.Id = v
+func (o *CreateCertificateResponse) SetId(v CreateCertificateResponseGetIdRetType) {
+	setCreateCertificateResponseGetIdAttributeType(&o.Id, v)
 }
 
 // GetRegion returns the Region field value if set, zero value otherwise.
-func (o *CreateCertificateResponse) GetRegion() *string {
-	if o == nil || IsNil(o.Region) {
-		var ret *string
-		return ret
-	}
-	return o.Region
+func (o *CreateCertificateResponse) GetRegion() (res CreateCertificateResponseGetRegionRetType) {
+	res, _ = o.GetRegionOk()
+	return
 }
 
 // GetRegionOk returns a tuple with the Region field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *CreateCertificateResponse) GetRegionOk() (*string, bool) {
-	if o == nil || IsNil(o.Region) {
-		return nil, false
-	}
-	return o.Region, true
+func (o *CreateCertificateResponse) GetRegionOk() (ret CreateCertificateResponseGetRegionRetType, ok bool) {
+	return getCreateCertificateResponseGetRegionAttributeTypeOk(o.Region)
 }
 
 // HasRegion returns a boolean if a field has been set.
 func (o *CreateCertificateResponse) HasRegion() bool {
-	if o != nil && !IsNil(o.Region) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetRegionOk()
+	return ok
 }
 
 // SetRegion gets a reference to the given string and assigns it to the Region field.
-func (o *CreateCertificateResponse) SetRegion(v *string) {
-	o.Region = v
+func (o *CreateCertificateResponse) SetRegion(v CreateCertificateResponseGetRegionRetType) {
+	setCreateCertificateResponseGetRegionAttributeType(&o.Region, v)
 }
 
 func (o CreateCertificateResponse) ToMap() (map[string]interface{}, error) {
 	toSerialize := map[string]interface{}{}
-	if !IsNil(o.Id) {
-		toSerialize["id"] = o.Id
+	if val, ok := getCreateCertificateResponseGetIdAttributeTypeOk(o.Id); ok {
+		toSerialize["Id"] = val
 	}
-	if !IsNil(o.Region) {
-		toSerialize["region"] = o.Region
+	if val, ok := getCreateCertificateResponseGetRegionAttributeTypeOk(o.Region); ok {
+		toSerialize["Region"] = val
 	}
 	return toSerialize, nil
 }
diff --git a/services/certificates/model_get_certificate_response.go b/services/certificates/model_get_certificate_response.go
index 85499b11d..6286d7ee3 100644
--- a/services/certificates/model_get_certificate_response.go
+++ b/services/certificates/model_get_certificate_response.go
@@ -17,16 +17,100 @@ import (
 // checks if the GetCertificateResponse type satisfies the MappedNullable interface at compile time
 var _ MappedNullable = &GetCertificateResponse{}
 
+/*
+	types and functions for id
+*/
+
+// isNotNullableString
+type GetCertificateResponseGetIdAttributeType = *string
+
+func getGetCertificateResponseGetIdAttributeTypeOk(arg GetCertificateResponseGetIdAttributeType) (ret GetCertificateResponseGetIdRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setGetCertificateResponseGetIdAttributeType(arg *GetCertificateResponseGetIdAttributeType, val GetCertificateResponseGetIdRetType) {
+	*arg = &val
+}
+
+type GetCertificateResponseGetIdArgType = string
+type GetCertificateResponseGetIdRetType = string
+
+/*
+	types and functions for name
+*/
+
+// isNotNullableString
+type GetCertificateResponseGetNameAttributeType = *string
+
+func getGetCertificateResponseGetNameAttributeTypeOk(arg GetCertificateResponseGetNameAttributeType) (ret GetCertificateResponseGetNameRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setGetCertificateResponseGetNameAttributeType(arg *GetCertificateResponseGetNameAttributeType, val GetCertificateResponseGetNameRetType) {
+	*arg = &val
+}
+
+type GetCertificateResponseGetNameArgType = string
+type GetCertificateResponseGetNameRetType = string
+
+/*
+	types and functions for publicKey
+*/
+
+// isNotNullableString
+type GetCertificateResponseGetPublicKeyAttributeType = *string
+
+func getGetCertificateResponseGetPublicKeyAttributeTypeOk(arg GetCertificateResponseGetPublicKeyAttributeType) (ret GetCertificateResponseGetPublicKeyRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setGetCertificateResponseGetPublicKeyAttributeType(arg *GetCertificateResponseGetPublicKeyAttributeType, val GetCertificateResponseGetPublicKeyRetType) {
+	*arg = &val
+}
+
+type GetCertificateResponseGetPublicKeyArgType = string
+type GetCertificateResponseGetPublicKeyRetType = string
+
+/*
+	types and functions for region
+*/
+
+// isNotNullableString
+type GetCertificateResponseGetRegionAttributeType = *string
+
+func getGetCertificateResponseGetRegionAttributeTypeOk(arg GetCertificateResponseGetRegionAttributeType) (ret GetCertificateResponseGetRegionRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setGetCertificateResponseGetRegionAttributeType(arg *GetCertificateResponseGetRegionAttributeType, val GetCertificateResponseGetRegionRetType) {
+	*arg = &val
+}
+
+type GetCertificateResponseGetRegionArgType = string
+type GetCertificateResponseGetRegionRetType = string
+
 // GetCertificateResponse GetCertificateResponse returns name, id and public key
 type GetCertificateResponse struct {
 	// The certificates resource id
-	Id *string `json:"id,omitempty"`
+	Id GetCertificateResponseGetIdAttributeType `json:"id,omitempty"`
 	// TLS certificate name
-	Name *string `json:"name,omitempty"`
+	Name GetCertificateResponseGetNameAttributeType `json:"name,omitempty"`
 	// The PEM encoded public key part
-	PublicKey *string `json:"publicKey,omitempty"`
+	PublicKey GetCertificateResponseGetPublicKeyAttributeType `json:"publicKey,omitempty"`
 	// Region of the LoadBalancer
-	Region *string `json:"region,omitempty"`
+	Region GetCertificateResponseGetRegionAttributeType `json:"region,omitempty"`
 }
 
 // NewGetCertificateResponse instantiates a new GetCertificateResponse object
@@ -47,146 +131,110 @@ func NewGetCertificateResponseWithDefaults() *GetCertificateResponse {
 }
 
 // GetId returns the Id field value if set, zero value otherwise.
-func (o *GetCertificateResponse) GetId() *string {
-	if o == nil || IsNil(o.Id) {
-		var ret *string
-		return ret
-	}
-	return o.Id
+func (o *GetCertificateResponse) GetId() (res GetCertificateResponseGetIdRetType) {
+	res, _ = o.GetIdOk()
+	return
 }
 
 // GetIdOk returns a tuple with the Id field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *GetCertificateResponse) GetIdOk() (*string, bool) {
-	if o == nil || IsNil(o.Id) {
-		return nil, false
-	}
-	return o.Id, true
+func (o *GetCertificateResponse) GetIdOk() (ret GetCertificateResponseGetIdRetType, ok bool) {
+	return getGetCertificateResponseGetIdAttributeTypeOk(o.Id)
 }
 
 // HasId returns a boolean if a field has been set.
 func (o *GetCertificateResponse) HasId() bool {
-	if o != nil && !IsNil(o.Id) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetIdOk()
+	return ok
 }
 
 // SetId gets a reference to the given string and assigns it to the Id field.
-func (o *GetCertificateResponse) SetId(v *string) {
-	o.Id = v
+func (o *GetCertificateResponse) SetId(v GetCertificateResponseGetIdRetType) {
+	setGetCertificateResponseGetIdAttributeType(&o.Id, v)
 }
 
 // GetName returns the Name field value if set, zero value otherwise.
-func (o *GetCertificateResponse) GetName() *string {
-	if o == nil || IsNil(o.Name) {
-		var ret *string
-		return ret
-	}
-	return o.Name
+func (o *GetCertificateResponse) GetName() (res GetCertificateResponseGetNameRetType) {
+	res, _ = o.GetNameOk()
+	return
 }
 
 // GetNameOk returns a tuple with the Name field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *GetCertificateResponse) GetNameOk() (*string, bool) {
-	if o == nil || IsNil(o.Name) {
-		return nil, false
-	}
-	return o.Name, true
+func (o *GetCertificateResponse) GetNameOk() (ret GetCertificateResponseGetNameRetType, ok bool) {
+	return getGetCertificateResponseGetNameAttributeTypeOk(o.Name)
 }
 
 // HasName returns a boolean if a field has been set.
 func (o *GetCertificateResponse) HasName() bool {
-	if o != nil && !IsNil(o.Name) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetNameOk()
+	return ok
 }
 
 // SetName gets a reference to the given string and assigns it to the Name field.
-func (o *GetCertificateResponse) SetName(v *string) {
-	o.Name = v
+func (o *GetCertificateResponse) SetName(v GetCertificateResponseGetNameRetType) {
+	setGetCertificateResponseGetNameAttributeType(&o.Name, v)
 }
 
 // GetPublicKey returns the PublicKey field value if set, zero value otherwise.
-func (o *GetCertificateResponse) GetPublicKey() *string {
-	if o == nil || IsNil(o.PublicKey) {
-		var ret *string
-		return ret
-	}
-	return o.PublicKey
+func (o *GetCertificateResponse) GetPublicKey() (res GetCertificateResponseGetPublicKeyRetType) {
+	res, _ = o.GetPublicKeyOk()
+	return
 }
 
 // GetPublicKeyOk returns a tuple with the PublicKey field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *GetCertificateResponse) GetPublicKeyOk() (*string, bool) {
-	if o == nil || IsNil(o.PublicKey) {
-		return nil, false
-	}
-	return o.PublicKey, true
+func (o *GetCertificateResponse) GetPublicKeyOk() (ret GetCertificateResponseGetPublicKeyRetType, ok bool) {
+	return getGetCertificateResponseGetPublicKeyAttributeTypeOk(o.PublicKey)
 }
 
 // HasPublicKey returns a boolean if a field has been set.
 func (o *GetCertificateResponse) HasPublicKey() bool {
-	if o != nil && !IsNil(o.PublicKey) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetPublicKeyOk()
+	return ok
 }
 
 // SetPublicKey gets a reference to the given string and assigns it to the PublicKey field.
-func (o *GetCertificateResponse) SetPublicKey(v *string) {
-	o.PublicKey = v
+func (o *GetCertificateResponse) SetPublicKey(v GetCertificateResponseGetPublicKeyRetType) {
+	setGetCertificateResponseGetPublicKeyAttributeType(&o.PublicKey, v)
 }
 
 // GetRegion returns the Region field value if set, zero value otherwise.
-func (o *GetCertificateResponse) GetRegion() *string {
-	if o == nil || IsNil(o.Region) {
-		var ret *string
-		return ret
-	}
-	return o.Region
+func (o *GetCertificateResponse) GetRegion() (res GetCertificateResponseGetRegionRetType) {
+	res, _ = o.GetRegionOk()
+	return
 }
 
 // GetRegionOk returns a tuple with the Region field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *GetCertificateResponse) GetRegionOk() (*string, bool) {
-	if o == nil || IsNil(o.Region) {
-		return nil, false
-	}
-	return o.Region, true
+func (o *GetCertificateResponse) GetRegionOk() (ret GetCertificateResponseGetRegionRetType, ok bool) {
+	return getGetCertificateResponseGetRegionAttributeTypeOk(o.Region)
 }
 
 // HasRegion returns a boolean if a field has been set.
 func (o *GetCertificateResponse) HasRegion() bool {
-	if o != nil && !IsNil(o.Region) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetRegionOk()
+	return ok
 }
 
 // SetRegion gets a reference to the given string and assigns it to the Region field.
-func (o *GetCertificateResponse) SetRegion(v *string) {
-	o.Region = v
+func (o *GetCertificateResponse) SetRegion(v GetCertificateResponseGetRegionRetType) {
+	setGetCertificateResponseGetRegionAttributeType(&o.Region, v)
 }
 
 func (o GetCertificateResponse) ToMap() (map[string]interface{}, error) {
 	toSerialize := map[string]interface{}{}
-	if !IsNil(o.Id) {
-		toSerialize["id"] = o.Id
+	if val, ok := getGetCertificateResponseGetIdAttributeTypeOk(o.Id); ok {
+		toSerialize["Id"] = val
 	}
-	if !IsNil(o.Name) {
-		toSerialize["name"] = o.Name
+	if val, ok := getGetCertificateResponseGetNameAttributeTypeOk(o.Name); ok {
+		toSerialize["Name"] = val
 	}
-	if !IsNil(o.PublicKey) {
-		toSerialize["publicKey"] = o.PublicKey
+	if val, ok := getGetCertificateResponseGetPublicKeyAttributeTypeOk(o.PublicKey); ok {
+		toSerialize["PublicKey"] = val
 	}
-	if !IsNil(o.Region) {
-		toSerialize["region"] = o.Region
+	if val, ok := getGetCertificateResponseGetRegionAttributeTypeOk(o.Region); ok {
+		toSerialize["Region"] = val
 	}
 	return toSerialize, nil
 }
diff --git a/services/certificates/model_google_protobuf_any.go b/services/certificates/model_google_protobuf_any.go
index 704db5d2c..c8b0e022f 100644
--- a/services/certificates/model_google_protobuf_any.go
+++ b/services/certificates/model_google_protobuf_any.go
@@ -17,10 +17,31 @@ import (
 // checks if the GoogleProtobufAny type satisfies the MappedNullable interface at compile time
 var _ MappedNullable = &GoogleProtobufAny{}
 
+/*
+	types and functions for @type
+*/
+
+// isNotNullableString
+type GoogleProtobufAnyGetTypeAttributeType = *string
+
+func getGoogleProtobufAnyGetTypeAttributeTypeOk(arg GoogleProtobufAnyGetTypeAttributeType) (ret GoogleProtobufAnyGetTypeRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setGoogleProtobufAnyGetTypeAttributeType(arg *GoogleProtobufAnyGetTypeAttributeType, val GoogleProtobufAnyGetTypeRetType) {
+	*arg = &val
+}
+
+type GoogleProtobufAnyGetTypeArgType = string
+type GoogleProtobufAnyGetTypeRetType = string
+
 // GoogleProtobufAny Contains an arbitrary serialized message along with a @type that describes the type of the serialized message.
 type GoogleProtobufAny struct {
 	// The type of the serialized message.
-	Type                 *string `json:"@type,omitempty"`
+	Type                 GoogleProtobufAnyGetTypeAttributeType `json:"@type,omitempty"`
 	AdditionalProperties map[string]interface{}
 }
 
@@ -44,41 +65,32 @@ func NewGoogleProtobufAnyWithDefaults() *GoogleProtobufAny {
 }
 
 // GetType returns the Type field value if set, zero value otherwise.
-func (o *GoogleProtobufAny) GetType() *string {
-	if o == nil || IsNil(o.Type) {
-		var ret *string
-		return ret
-	}
-	return o.Type
+func (o *GoogleProtobufAny) GetType() (res GoogleProtobufAnyGetTypeRetType) {
+	res, _ = o.GetTypeOk()
+	return
 }
 
 // GetTypeOk returns a tuple with the Type field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *GoogleProtobufAny) GetTypeOk() (*string, bool) {
-	if o == nil || IsNil(o.Type) {
-		return nil, false
-	}
-	return o.Type, true
+func (o *GoogleProtobufAny) GetTypeOk() (ret GoogleProtobufAnyGetTypeRetType, ok bool) {
+	return getGoogleProtobufAnyGetTypeAttributeTypeOk(o.Type)
 }
 
 // HasType returns a boolean if a field has been set.
 func (o *GoogleProtobufAny) HasType() bool {
-	if o != nil && !IsNil(o.Type) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetTypeOk()
+	return ok
 }
 
 // SetType gets a reference to the given string and assigns it to the Type field.
-func (o *GoogleProtobufAny) SetType(v *string) {
-	o.Type = v
+func (o *GoogleProtobufAny) SetType(v GoogleProtobufAnyGetTypeRetType) {
+	setGoogleProtobufAnyGetTypeAttributeType(&o.Type, v)
 }
 
 func (o GoogleProtobufAny) ToMap() (map[string]interface{}, error) {
 	toSerialize := map[string]interface{}{}
-	if !IsNil(o.Type) {
-		toSerialize["@type"] = o.Type
+	if val, ok := getGoogleProtobufAnyGetTypeAttributeTypeOk(o.Type); ok {
+		toSerialize["Type"] = val
 	}
 
 	for key, value := range o.AdditionalProperties {
diff --git a/services/certificates/model_list_certificates_response.go b/services/certificates/model_list_certificates_response.go
index 3cc6e6138..4ba499bf4 100644
--- a/services/certificates/model_list_certificates_response.go
+++ b/services/certificates/model_list_certificates_response.go
@@ -17,11 +17,52 @@ import (
 // checks if the ListCertificatesResponse type satisfies the MappedNullable interface at compile time
 var _ MappedNullable = &ListCertificatesResponse{}
 
+/*
+	types and functions for items
+*/
+
+// isArray
+type ListCertificatesResponseGetItemsAttributeType = *[]GetCertificateResponse
+type ListCertificatesResponseGetItemsArgType = []GetCertificateResponse
+type ListCertificatesResponseGetItemsRetType = []GetCertificateResponse
+
+func getListCertificatesResponseGetItemsAttributeTypeOk(arg ListCertificatesResponseGetItemsAttributeType) (ret ListCertificatesResponseGetItemsRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setListCertificatesResponseGetItemsAttributeType(arg *ListCertificatesResponseGetItemsAttributeType, val ListCertificatesResponseGetItemsRetType) {
+	*arg = &val
+}
+
+/*
+	types and functions for nextPageId
+*/
+
+// isNotNullableString
+type ListCertificatesResponseGetNextPageIdAttributeType = *string
+
+func getListCertificatesResponseGetNextPageIdAttributeTypeOk(arg ListCertificatesResponseGetNextPageIdAttributeType) (ret ListCertificatesResponseGetNextPageIdRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setListCertificatesResponseGetNextPageIdAttributeType(arg *ListCertificatesResponseGetNextPageIdAttributeType, val ListCertificatesResponseGetNextPageIdRetType) {
+	*arg = &val
+}
+
+type ListCertificatesResponseGetNextPageIdArgType = string
+type ListCertificatesResponseGetNextPageIdRetType = string
+
 // ListCertificatesResponse ListCertificateResponse returns a list of certificate responses
 type ListCertificatesResponse struct {
-	Items *[]GetCertificateResponse `json:"items,omitempty"`
+	Items ListCertificatesResponseGetItemsAttributeType `json:"items,omitempty"`
 	// Continue token from the ListCertificatesResponse with Limit option
-	NextPageId *string `json:"nextPageId,omitempty"`
+	NextPageId ListCertificatesResponseGetNextPageIdAttributeType `json:"nextPageId,omitempty"`
 }
 
 // NewListCertificatesResponse instantiates a new ListCertificatesResponse object
@@ -42,76 +83,58 @@ func NewListCertificatesResponseWithDefaults() *ListCertificatesResponse {
 }
 
 // GetItems returns the Items field value if set, zero value otherwise.
-func (o *ListCertificatesResponse) GetItems() *[]GetCertificateResponse {
-	if o == nil || IsNil(o.Items) {
-		var ret *[]GetCertificateResponse
-		return ret
-	}
-	return o.Items
+func (o *ListCertificatesResponse) GetItems() (res ListCertificatesResponseGetItemsRetType) {
+	res, _ = o.GetItemsOk()
+	return
 }
 
 // GetItemsOk returns a tuple with the Items field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *ListCertificatesResponse) GetItemsOk() (*[]GetCertificateResponse, bool) {
-	if o == nil || IsNil(o.Items) {
-		return nil, false
-	}
-	return o.Items, true
+func (o *ListCertificatesResponse) GetItemsOk() (ret ListCertificatesResponseGetItemsRetType, ok bool) {
+	return getListCertificatesResponseGetItemsAttributeTypeOk(o.Items)
 }
 
 // HasItems returns a boolean if a field has been set.
 func (o *ListCertificatesResponse) HasItems() bool {
-	if o != nil && !IsNil(o.Items) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetItemsOk()
+	return ok
 }
 
 // SetItems gets a reference to the given []GetCertificateResponse and assigns it to the Items field.
-func (o *ListCertificatesResponse) SetItems(v *[]GetCertificateResponse) {
-	o.Items = v
+func (o *ListCertificatesResponse) SetItems(v ListCertificatesResponseGetItemsRetType) {
+	setListCertificatesResponseGetItemsAttributeType(&o.Items, v)
 }
 
 // GetNextPageId returns the NextPageId field value if set, zero value otherwise.
-func (o *ListCertificatesResponse) GetNextPageId() *string {
-	if o == nil || IsNil(o.NextPageId) {
-		var ret *string
-		return ret
-	}
-	return o.NextPageId
+func (o *ListCertificatesResponse) GetNextPageId() (res ListCertificatesResponseGetNextPageIdRetType) {
+	res, _ = o.GetNextPageIdOk()
+	return
 }
 
 // GetNextPageIdOk returns a tuple with the NextPageId field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *ListCertificatesResponse) GetNextPageIdOk() (*string, bool) {
-	if o == nil || IsNil(o.NextPageId) {
-		return nil, false
-	}
-	return o.NextPageId, true
+func (o *ListCertificatesResponse) GetNextPageIdOk() (ret ListCertificatesResponseGetNextPageIdRetType, ok bool) {
+	return getListCertificatesResponseGetNextPageIdAttributeTypeOk(o.NextPageId)
 }
 
 // HasNextPageId returns a boolean if a field has been set.
 func (o *ListCertificatesResponse) HasNextPageId() bool {
-	if o != nil && !IsNil(o.NextPageId) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetNextPageIdOk()
+	return ok
 }
 
 // SetNextPageId gets a reference to the given string and assigns it to the NextPageId field.
-func (o *ListCertificatesResponse) SetNextPageId(v *string) {
-	o.NextPageId = v
+func (o *ListCertificatesResponse) SetNextPageId(v ListCertificatesResponseGetNextPageIdRetType) {
+	setListCertificatesResponseGetNextPageIdAttributeType(&o.NextPageId, v)
 }
 
 func (o ListCertificatesResponse) ToMap() (map[string]interface{}, error) {
 	toSerialize := map[string]interface{}{}
-	if !IsNil(o.Items) {
-		toSerialize["items"] = o.Items
+	if val, ok := getListCertificatesResponseGetItemsAttributeTypeOk(o.Items); ok {
+		toSerialize["Items"] = val
 	}
-	if !IsNil(o.NextPageId) {
-		toSerialize["nextPageId"] = o.NextPageId
+	if val, ok := getListCertificatesResponseGetNextPageIdAttributeTypeOk(o.NextPageId); ok {
+		toSerialize["NextPageId"] = val
 	}
 	return toSerialize, nil
 }
diff --git a/services/certificates/model_status.go b/services/certificates/model_status.go
index a6849bf48..331aa9e85 100644
--- a/services/certificates/model_status.go
+++ b/services/certificates/model_status.go
@@ -17,15 +17,76 @@ import (
 // checks if the Status type satisfies the MappedNullable interface at compile time
 var _ MappedNullable = &Status{}
 
+/*
+	types and functions for code
+*/
+
+// isInteger
+type StatusGetCodeAttributeType = *int64
+type StatusGetCodeArgType = int64
+type StatusGetCodeRetType = int64
+
+func getStatusGetCodeAttributeTypeOk(arg StatusGetCodeAttributeType) (ret StatusGetCodeRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setStatusGetCodeAttributeType(arg *StatusGetCodeAttributeType, val StatusGetCodeRetType) {
+	*arg = &val
+}
+
+/*
+	types and functions for details
+*/
+
+// isArray
+type StatusGetDetailsAttributeType = *[]GoogleProtobufAny
+type StatusGetDetailsArgType = []GoogleProtobufAny
+type StatusGetDetailsRetType = []GoogleProtobufAny
+
+func getStatusGetDetailsAttributeTypeOk(arg StatusGetDetailsAttributeType) (ret StatusGetDetailsRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setStatusGetDetailsAttributeType(arg *StatusGetDetailsAttributeType, val StatusGetDetailsRetType) {
+	*arg = &val
+}
+
+/*
+	types and functions for message
+*/
+
+// isNotNullableString
+type StatusGetMessageAttributeType = *string
+
+func getStatusGetMessageAttributeTypeOk(arg StatusGetMessageAttributeType) (ret StatusGetMessageRetType, ok bool) {
+	if arg == nil {
+		return ret, false
+	}
+	return *arg, true
+}
+
+func setStatusGetMessageAttributeType(arg *StatusGetMessageAttributeType, val StatusGetMessageRetType) {
+	*arg = &val
+}
+
+type StatusGetMessageArgType = string
+type StatusGetMessageRetType = string
+
 // Status The `Status` type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by [gRPC](https://github.com/grpc). Each `Status` message contains three pieces of data: error code, error message, and error details. You can find out more about this error model and how to work with it in the [API Design Guide](https://cloud.google.com/apis/design/errors).
 type Status struct {
 	// The status code, which should be an enum value of [google.rpc.Code][google.rpc.Code].
 	// Can be cast to int32 without loss of precision.
-	Code *int64 `json:"code,omitempty"`
+	Code StatusGetCodeAttributeType `json:"code,omitempty"`
 	// A list of messages that carry the error details.  There is a common set of message types for APIs to use.
-	Details *[]GoogleProtobufAny `json:"details,omitempty"`
+	Details StatusGetDetailsAttributeType `json:"details,omitempty"`
 	// A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the [google.rpc.Status.details][google.rpc.Status.details] field, or localized by the client.
-	Message *string `json:"message,omitempty"`
+	Message StatusGetMessageAttributeType `json:"message,omitempty"`
 }
 
 // NewStatus instantiates a new Status object
@@ -46,111 +107,84 @@ func NewStatusWithDefaults() *Status {
 }
 
 // GetCode returns the Code field value if set, zero value otherwise.
-func (o *Status) GetCode() *int64 {
-	if o == nil || IsNil(o.Code) {
-		var ret *int64
-		return ret
-	}
-	return o.Code
+func (o *Status) GetCode() (res StatusGetCodeRetType) {
+	res, _ = o.GetCodeOk()
+	return
 }
 
 // GetCodeOk returns a tuple with the Code field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *Status) GetCodeOk() (*int64, bool) {
-	if o == nil || IsNil(o.Code) {
-		return nil, false
-	}
-	return o.Code, true
+func (o *Status) GetCodeOk() (ret StatusGetCodeRetType, ok bool) {
+	return getStatusGetCodeAttributeTypeOk(o.Code)
 }
 
 // HasCode returns a boolean if a field has been set.
 func (o *Status) HasCode() bool {
-	if o != nil && !IsNil(o.Code) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetCodeOk()
+	return ok
 }
 
 // SetCode gets a reference to the given int64 and assigns it to the Code field.
-func (o *Status) SetCode(v *int64) {
-	o.Code = v
+func (o *Status) SetCode(v StatusGetCodeRetType) {
+	setStatusGetCodeAttributeType(&o.Code, v)
 }
 
 // GetDetails returns the Details field value if set, zero value otherwise.
-func (o *Status) GetDetails() *[]GoogleProtobufAny {
-	if o == nil || IsNil(o.Details) {
-		var ret *[]GoogleProtobufAny
-		return ret
-	}
-	return o.Details
+func (o *Status) GetDetails() (res StatusGetDetailsRetType) {
+	res, _ = o.GetDetailsOk()
+	return
 }
 
 // GetDetailsOk returns a tuple with the Details field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *Status) GetDetailsOk() (*[]GoogleProtobufAny, bool) {
-	if o == nil || IsNil(o.Details) {
-		return nil, false
-	}
-	return o.Details, true
+func (o *Status) GetDetailsOk() (ret StatusGetDetailsRetType, ok bool) {
+	return getStatusGetDetailsAttributeTypeOk(o.Details)
 }
 
 // HasDetails returns a boolean if a field has been set.
 func (o *Status) HasDetails() bool {
-	if o != nil && !IsNil(o.Details) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetDetailsOk()
+	return ok
 }
 
 // SetDetails gets a reference to the given []GoogleProtobufAny and assigns it to the Details field.
-func (o *Status) SetDetails(v *[]GoogleProtobufAny) {
-	o.Details = v
+func (o *Status) SetDetails(v StatusGetDetailsRetType) {
+	setStatusGetDetailsAttributeType(&o.Details, v)
 }
 
 // GetMessage returns the Message field value if set, zero value otherwise.
-func (o *Status) GetMessage() *string {
-	if o == nil || IsNil(o.Message) {
-		var ret *string
-		return ret
-	}
-	return o.Message
+func (o *Status) GetMessage() (res StatusGetMessageRetType) {
+	res, _ = o.GetMessageOk()
+	return
 }
 
 // GetMessageOk returns a tuple with the Message field value if set, nil otherwise
 // and a boolean to check if the value has been set.
-func (o *Status) GetMessageOk() (*string, bool) {
-	if o == nil || IsNil(o.Message) {
-		return nil, false
-	}
-	return o.Message, true
+func (o *Status) GetMessageOk() (ret StatusGetMessageRetType, ok bool) {
+	return getStatusGetMessageAttributeTypeOk(o.Message)
 }
 
 // HasMessage returns a boolean if a field has been set.
 func (o *Status) HasMessage() bool {
-	if o != nil && !IsNil(o.Message) {
-		return true
-	}
-
-	return false
+	_, ok := o.GetMessageOk()
+	return ok
 }
 
 // SetMessage gets a reference to the given string and assigns it to the Message field.
-func (o *Status) SetMessage(v *string) {
-	o.Message = v
+func (o *Status) SetMessage(v StatusGetMessageRetType) {
+	setStatusGetMessageAttributeType(&o.Message, v)
 }
 
 func (o Status) ToMap() (map[string]interface{}, error) {
 	toSerialize := map[string]interface{}{}
-	if !IsNil(o.Code) {
-		toSerialize["code"] = o.Code
+	if val, ok := getStatusGetCodeAttributeTypeOk(o.Code); ok {
+		toSerialize["Code"] = val
 	}
-	if !IsNil(o.Details) {
-		toSerialize["details"] = o.Details
+	if val, ok := getStatusGetDetailsAttributeTypeOk(o.Details); ok {
+		toSerialize["Details"] = val
 	}
-	if !IsNil(o.Message) {
-		toSerialize["message"] = o.Message
+	if val, ok := getStatusGetMessageAttributeTypeOk(o.Message); ok {
+		toSerialize["Message"] = val
 	}
 	return toSerialize, nil
 }
diff --git a/services/certificates/utils.go b/services/certificates/utils.go
index 585f513e3..1c911ae83 100644
--- a/services/certificates/utils.go
+++ b/services/certificates/utils.go
@@ -40,6 +40,29 @@ func PtrString(v string) *string { return &v }
 // PtrTime is helper routine that returns a pointer to given Time value.
 func PtrTime(v time.Time) *time.Time { return &v }
 
+type NullableValue[T any] struct {
+	value *T
+	isSet bool
+}
+
+func (v NullableValue[T]) Get() *T {
+	return v.value
+}
+
+func (v *NullableValue[T]) Set(val *T) {
+	v.value = val
+	v.isSet = true
+}
+
+func (v NullableValue[T]) IsSet() bool {
+	return v.isSet
+}
+
+func (v *NullableValue[T]) Unset() {
+	v.value = nil
+	v.isSet = false
+}
+
 type NullableBool struct {
 	value *bool
 	isSet bool
@@ -333,6 +356,9 @@ func IsNil(i interface{}) bool {
 	if i == nil {
 		return true
 	}
+	if t, ok := i.(interface{ IsSet() bool }); ok {
+		return !t.IsSet()
+	}
 	switch reflect.TypeOf(i).Kind() {
 	case reflect.Chan, reflect.Func, reflect.Map, reflect.Ptr, reflect.UnsafePointer, reflect.Interface, reflect.Slice:
 		return reflect.ValueOf(i).IsNil()