diff --git a/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/RoutingTwin.java b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/RoutingTwin.java
new file mode 100644
index 000000000000..7840cb7a128a
--- /dev/null
+++ b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/RoutingTwin.java
@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.iothub.v2018_04_01;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Twin reference input parameter. This is an optional parameter.
+ */
+public class RoutingTwin {
+    /**
+     * Twin Tags.
+     */
+    @JsonProperty(value = "tags")
+    private Object tags;
+
+    /**
+     * The properties property.
+     */
+    @JsonProperty(value = "properties")
+    private RoutingTwinProperties properties;
+
+    /**
+     * Get twin Tags.
+     *
+     * @return the tags value
+     */
+    public Object tags() {
+        return this.tags;
+    }
+
+    /**
+     * Set twin Tags.
+     *
+     * @param tags the tags value to set
+     * @return the RoutingTwin object itself.
+     */
+    public RoutingTwin withTags(Object tags) {
+        this.tags = tags;
+        return this;
+    }
+
+    /**
+     * Get the properties value.
+     *
+     * @return the properties value
+     */
+    public RoutingTwinProperties properties() {
+        return this.properties;
+    }
+
+    /**
+     * Set the properties value.
+     *
+     * @param properties the properties value to set
+     * @return the RoutingTwin object itself.
+     */
+    public RoutingTwin withProperties(RoutingTwinProperties properties) {
+        this.properties = properties;
+        return this;
+    }
+
+}
diff --git a/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/RoutingTwinProperties.java b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/RoutingTwinProperties.java
new file mode 100644
index 000000000000..de98fd94b514
--- /dev/null
+++ b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/RoutingTwinProperties.java
@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.iothub.v2018_04_01;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * The RoutingTwinProperties model.
+ */
+public class RoutingTwinProperties {
+    /**
+     * Twin desired properties.
+     */
+    @JsonProperty(value = "desiredProperties")
+    private Object desiredProperties;
+
+    /**
+     * Twin desired properties.
+     */
+    @JsonProperty(value = "reportedProperties")
+    private Object reportedProperties;
+
+    /**
+     * Get twin desired properties.
+     *
+     * @return the desiredProperties value
+     */
+    public Object desiredProperties() {
+        return this.desiredProperties;
+    }
+
+    /**
+     * Set twin desired properties.
+     *
+     * @param desiredProperties the desiredProperties value to set
+     * @return the RoutingTwinProperties object itself.
+     */
+    public RoutingTwinProperties withDesiredProperties(Object desiredProperties) {
+        this.desiredProperties = desiredProperties;
+        return this;
+    }
+
+    /**
+     * Get twin desired properties.
+     *
+     * @return the reportedProperties value
+     */
+    public Object reportedProperties() {
+        return this.reportedProperties;
+    }
+
+    /**
+     * Set twin desired properties.
+     *
+     * @param reportedProperties the reportedProperties value to set
+     * @return the RoutingTwinProperties object itself.
+     */
+    public RoutingTwinProperties withReportedProperties(Object reportedProperties) {
+        this.reportedProperties = reportedProperties;
+        return this;
+    }
+
+}
diff --git a/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestAllRoutesInput.java b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestAllRoutesInput.java
index 692b61973fa6..cd828a1749d1 100644
--- a/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestAllRoutesInput.java
+++ b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestAllRoutesInput.java
@@ -27,6 +27,12 @@ public class TestAllRoutesInput {
     @JsonProperty(value = "message")
     private RoutingMessage message;
 
+    /**
+     * Routing Twin Reference.
+     */
+    @JsonProperty(value = "twin")
+    private RoutingTwin twin;
+
     /**
      * Get routing source. Possible values include: 'Invalid', 'DeviceMessages', 'TwinChangeEvents', 'DeviceLifecycleEvents', 'DeviceJobLifecycleEvents'.
      *
@@ -67,4 +73,24 @@ public TestAllRoutesInput withMessage(RoutingMessage message) {
         return this;
     }
 
+    /**
+     * Get routing Twin Reference.
+     *
+     * @return the twin value
+     */
+    public RoutingTwin twin() {
+        return this.twin;
+    }
+
+    /**
+     * Set routing Twin Reference.
+     *
+     * @param twin the twin value to set
+     * @return the TestAllRoutesInput object itself.
+     */
+    public TestAllRoutesInput withTwin(RoutingTwin twin) {
+        this.twin = twin;
+        return this;
+    }
+
 }
diff --git a/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestRouteInput.java b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestRouteInput.java
index 046d26ab57c0..6859fc5a8ff8 100644
--- a/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestRouteInput.java
+++ b/iothub/resource-manager/v2018_04_01/src/main/java/com/microsoft/azure/management/iothub/v2018_04_01/TestRouteInput.java
@@ -26,6 +26,12 @@ public class TestRouteInput {
     @JsonProperty(value = "route", required = true)
     private RouteProperties route;
 
+    /**
+     * Routing Twin Reference.
+     */
+    @JsonProperty(value = "twin")
+    private RoutingTwin twin;
+
     /**
      * Get routing message.
      *
@@ -66,4 +72,24 @@ public TestRouteInput withRoute(RouteProperties route) {
         return this;
     }
 
+    /**
+     * Get routing Twin Reference.
+     *
+     * @return the twin value
+     */
+    public RoutingTwin twin() {
+        return this.twin;
+    }
+
+    /**
+     * Set routing Twin Reference.
+     *
+     * @param twin the twin value to set
+     * @return the TestRouteInput object itself.
+     */
+    public TestRouteInput withTwin(RoutingTwin twin) {
+        this.twin = twin;
+        return this;
+    }
+
 }