diff --git a/Modules/Core/Common/include/itkMapContainer.h b/Modules/Core/Common/include/itkMapContainer.h
index 956087a6b43..abb66e2545d 100644
--- a/Modules/Core/Common/include/itkMapContainer.h
+++ b/Modules/Core/Common/include/itkMapContainer.h
@@ -461,7 +461,8 @@ class ITK_TEMPLATE_EXPORT MapContainer
    * memory usage.
    */
   void
-  Squeeze();
+  Squeeze()
+  {}
 
   /**
    * Tell the container to release any memory it may have allocated and
diff --git a/Modules/Core/Common/include/itkMapContainer.hxx b/Modules/Core/Common/include/itkMapContainer.hxx
index 1792e7555d8..e527e70e82e 100644
--- a/Modules/Core/Common/include/itkMapContainer.hxx
+++ b/Modules/Core/Common/include/itkMapContainer.hxx
@@ -226,16 +226,6 @@ MapContainer<TElementIdentifier, TElement>::Reserve(ElementIdentifier sz)
   }
 }
 
-/**
- * Tell the container to try to minimize its memory usage for storage of
- * the current number of elements.  This is NOT guaranteed to decrease
- * memory usage.
- */
-template <typename TElementIdentifier, typename TElement>
-void
-MapContainer<TElementIdentifier, TElement>::Squeeze()
-{}
-
 /**
  * Tell the container to release any memory it may have allocated and
  * return itself to its initial state.
diff --git a/Modules/Core/Common/include/itkPyImageFilter.h b/Modules/Core/Common/include/itkPyImageFilter.h
index 9b6401078e7..9d8acb77e61 100644
--- a/Modules/Core/Common/include/itkPyImageFilter.h
+++ b/Modules/Core/Common/include/itkPyImageFilter.h
@@ -102,7 +102,7 @@ class ITK_TEMPLATE_EXPORT PyImageFilter : public ImageToImageFilter<TInputImage,
   }
 
 protected:
-  PyImageFilter();
+  PyImageFilter() = default;
   ~PyImageFilter() override;
 
   void
diff --git a/Modules/Core/Common/include/itkPyImageFilter.hxx b/Modules/Core/Common/include/itkPyImageFilter.hxx
index 5137f068b72..cc5801680ad 100644
--- a/Modules/Core/Common/include/itkPyImageFilter.hxx
+++ b/Modules/Core/Common/include/itkPyImageFilter.hxx
@@ -23,10 +23,6 @@
 namespace itk
 {
 
-template <class TInputImage, class TOutputImage>
-PyImageFilter<TInputImage, TOutputImage>::PyImageFilter()
-{}
-
 template <class TInputImage, class TOutputImage>
 PyImageFilter<TInputImage, TOutputImage>::~PyImageFilter()
 {
diff --git a/Modules/Core/Common/include/itkVectorContainer.h b/Modules/Core/Common/include/itkVectorContainer.h
index 9ee59857bde..e5a8f96ee27 100644
--- a/Modules/Core/Common/include/itkVectorContainer.h
+++ b/Modules/Core/Common/include/itkVectorContainer.h
@@ -549,7 +549,8 @@ class ITK_TEMPLATE_EXPORT VectorContainer
    * with other containers in the toolkit.
    */
   void
-  Squeeze();
+  Squeeze()
+  {}
 
   /**
    * Clear the elements. The final size will be zero.
diff --git a/Modules/Core/Common/include/itkVectorContainer.hxx b/Modules/Core/Common/include/itkVectorContainer.hxx
index a8fc5962093..570c47ef006 100644
--- a/Modules/Core/Common/include/itkVectorContainer.hxx
+++ b/Modules/Core/Common/include/itkVectorContainer.hxx
@@ -178,11 +178,6 @@ VectorContainer<TElementIdentifier, TElement>::Reserve(ElementIdentifier sz)
 {
   this->CreateIndex(sz - 1);
 }
-
-template <typename TElementIdentifier, typename TElement>
-void
-VectorContainer<TElementIdentifier, TElement>::Squeeze()
-{}
 } // namespace itk::detail
 
 #endif
diff --git a/Modules/Core/Mesh/include/itkImageToMeshFilter.h b/Modules/Core/Mesh/include/itkImageToMeshFilter.h
index fb06d248d98..cda99ff5b21 100644
--- a/Modules/Core/Mesh/include/itkImageToMeshFilter.h
+++ b/Modules/Core/Mesh/include/itkImageToMeshFilter.h
@@ -87,9 +87,10 @@ class ITK_TEMPLATE_EXPORT ImageToMeshFilter : public MeshSource<TOutputMesh>
   OutputMeshType *
   GetOutput();
 
-  /** Prepare the output */
+  /** Prepare the output. This is a void implementation to prevent the ProcessObject version to be called. */
   void
-  GenerateOutputInformation() override;
+  GenerateOutputInformation() override
+  {}
 
 protected:
   ImageToMeshFilter();
diff --git a/Modules/Core/Mesh/include/itkImageToMeshFilter.hxx b/Modules/Core/Mesh/include/itkImageToMeshFilter.hxx
index 00d72c3038c..467299a9b9e 100644
--- a/Modules/Core/Mesh/include/itkImageToMeshFilter.hxx
+++ b/Modules/Core/Mesh/include/itkImageToMeshFilter.hxx
@@ -78,15 +78,6 @@ ImageToMeshFilter<TInputImage, TOutputMesh>::GetOutput() -> OutputMeshType *
   return dynamic_cast<OutputMeshType *>(this->ProcessObject::GetOutput(0));
 }
 
-/**
- * copy information from first input to all outputs
- * This is a void implementation to prevent the
- * ProcessObject version to be called
- */
-template <typename TInputImage, typename TOutputMesh>
-void
-ImageToMeshFilter<TInputImage, TOutputMesh>::GenerateOutputInformation()
-{}
 } // end namespace itk
 
 #endif
diff --git a/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.h b/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.h
index 2423ba0092b..f3343105cad 100644
--- a/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.h
+++ b/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.h
@@ -431,7 +431,8 @@ class ITK_TEMPLATE_EXPORT PatchBasedDenoisingImageFilter
   ThreadedApplyUpdate(const InputImageRegionType & regionToProcess, const int itkNotUsed(threadId));
 
   void
-  PostProcessOutput() override;
+  PostProcessOutput() override
+  {}
 
   virtual void
   SetThreadData(int threadId, const ThreadDataStruct & data);
diff --git a/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.hxx b/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.hxx
index 902ffaf61ff..64ad94dbfdf 100644
--- a/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.hxx
+++ b/Modules/Filtering/Denoising/include/itkPatchBasedDenoisingImageFilter.hxx
@@ -2332,11 +2332,6 @@ PatchBasedDenoisingImageFilter<TInputImage, TOutputImage>::ComputeGradientJointE
   return gradientJointEntropy;
 }
 
-template <typename TInputImage, typename TOutputImage>
-void
-PatchBasedDenoisingImageFilter<TInputImage, TOutputImage>::PostProcessOutput()
-{}
-
 template <typename TInputImage, typename TOutputImage>
 void
 PatchBasedDenoisingImageFilter<TInputImage, TOutputImage>::PrintSelf(std::ostream & os, Indent indent) const
diff --git a/Modules/Numerics/FEM/include/itkFEMSolver.h b/Modules/Numerics/FEM/include/itkFEMSolver.h
index 5ffa36415a7..9b1b6599fe1 100644
--- a/Modules/Numerics/FEM/include/itkFEMSolver.h
+++ b/Modules/Numerics/FEM/include/itkFEMSolver.h
@@ -382,7 +382,8 @@ class ITK_TEMPLATE_EXPORT Solver : public ProcessObject
 
   /** Decompose matrix using svd, qr, etc. if needed. */
   void
-  DecomposeK();
+  DecomposeK()
+  {}
 
   /** Solve for the displacement vector u. May be overridden in derived
    * classes. */
diff --git a/Modules/Numerics/FEM/include/itkFEMSolver.hxx b/Modules/Numerics/FEM/include/itkFEMSolver.hxx
index 295e78970f9..fd30babeb04 100644
--- a/Modules/Numerics/FEM/include/itkFEMSolver.hxx
+++ b/Modules/Numerics/FEM/include/itkFEMSolver.hxx
@@ -517,11 +517,6 @@ Solver<VDimension>::AssembleF(int dim)
   }
 }
 
-template <unsigned int VDimension>
-void
-Solver<VDimension>::DecomposeK()
-{}
-
 template <unsigned int VDimension>
 void
 Solver<VDimension>::RunSolver()
diff --git a/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.h b/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.h
index 4594fe05615..86292d711ba 100644
--- a/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.h
+++ b/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.h
@@ -271,7 +271,8 @@ class ITK_TEMPLATE_EXPORT NarrowBandImageFilterBase : public FiniteDifferenceIma
   /** This method allows deallocation of data and further post processing
    */
   void
-  PostProcessOutput() override;
+  PostProcessOutput() override
+  {}
 
   /* This function clears all pixels from the narrow band */
   void
diff --git a/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.hxx b/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.hxx
index 2f3b7c943d8..21175f05b34 100644
--- a/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.hxx
+++ b/Modules/Numerics/NarrowBand/include/itkNarrowBandImageFilterBase.hxx
@@ -281,11 +281,6 @@ NarrowBandImageFilterBase<TInputImage, TOutputImage>::ThreadedCalculateChange(co
   return timeStep;
 }
 
-template <typename TInputImage, typename TOutputImage>
-void
-NarrowBandImageFilterBase<TInputImage, TOutputImage>::PostProcessOutput()
-{}
-
 template <typename TInputImage, typename TOutputImage>
 void
 NarrowBandImageFilterBase<TInputImage, TOutputImage>::GetSplitRegion(const size_t & i, ThreadRegionType & splitRegion)
diff --git a/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.h b/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.h
index a1933ff15c9..0c745ae1635 100644
--- a/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.h
+++ b/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.h
@@ -141,7 +141,8 @@ class ITK_TEMPLATE_EXPORT BinaryMaskToNarrowBandPointSetFilter : public ImageToM
 
   /** Some type alias associated with the output mesh. */
   void
-  GenerateOutputInformation() override;
+  GenerateOutputInformation() override
+  {}
 
 private:
   DistanceFilterPointer m_DistanceFilter{};
diff --git a/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.hxx b/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.hxx
index 9f639e28cf8..508a913374e 100644
--- a/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.hxx
+++ b/Modules/Segmentation/LevelSets/include/itkBinaryMaskToNarrowBandPointSetFilter.hxx
@@ -62,14 +62,6 @@ BinaryMaskToNarrowBandPointSetFilter<TInputImage, TOutputMesh>::PrintSelf(std::o
   os << indent << "BandWidth: " << m_BandWidth << std::endl;
 }
 
-/**
- *
- */
-template <typename TInputImage, typename TOutputMesh>
-void
-BinaryMaskToNarrowBandPointSetFilter<TInputImage, TOutputMesh>::GenerateOutputInformation()
-{}
-
 /**
  *
  */
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.h
index f3220fd7f06..03ec0466a69 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.h
@@ -71,7 +71,8 @@ class ITK_TEMPLATE_EXPORT LevelSetDomainPartitionMesh : public LevelSetDomainPar
   /** Allocate a list mesh with each node being a list of overlapping
    *  level set support at that pixel */
   void
-  AllocateListDomain();
+  AllocateListDomain()
+  {}
 
 private:
   MeshPointer  m_Mesh{};
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.hxx
index 96d36dd430c..00140ffb9a2 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetDomainPartitionMesh.hxx
@@ -48,11 +48,6 @@ LevelSetDomainPartitionMesh<TMesh>::PopulateListDomain()
   }
 }
 
-template <typename TMesh>
-void
-LevelSetDomainPartitionMesh<TMesh>::AllocateListDomain()
-{}
-
 } // end namespace itk
 
 #endif
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.h
index e183b966c3c..5cded8a0904 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.h
@@ -109,7 +109,8 @@ class ITK_TEMPLATE_EXPORT LevelSetEquationAdvectionTerm : public LevelSetEquatio
 
   /** \todo to be documented. */
   void
-  Update() override;
+  Update() override
+  {}
 
   /** Initialize the parameters in the terms prior to an iteration */
   void
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.hxx
index ba76c23b646..4904b9753a3 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationAdvectionTerm.hxx
@@ -123,11 +123,6 @@ void
 LevelSetEquationAdvectionTerm<TInput, TLevelSetContainer>::Initialize(const LevelSetInputIndexType &)
 {}
 
-template <typename TInput, typename TLevelSetContainer>
-void
-LevelSetEquationAdvectionTerm<TInput, TLevelSetContainer>::Update()
-{}
-
 template <typename TInput, typename TLevelSetContainer>
 void
 LevelSetEquationAdvectionTerm<TInput, TLevelSetContainer>::UpdatePixel(
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.h
index b07b935d185..5d89f5ebbc1 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.h
@@ -85,7 +85,8 @@ class ITK_TEMPLATE_EXPORT LevelSetEquationBinaryMaskTerm : public LevelSetEquati
 
   /** Update the term parameter values at end of iteration */
   void
-  Update() override;
+  Update() override
+  {}
 
   /** Initialize parameters in the terms prior to an iteration */
   void
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.hxx
index 5a1d0671933..7ce57591ca2 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationBinaryMaskTerm.hxx
@@ -30,11 +30,6 @@ LevelSetEquationBinaryMaskTerm<TInput, TLevelSetContainer>::LevelSetEquationBina
   this->m_RequiredData.insert("Value");
 }
 
-template <typename TInput, typename TLevelSetContainer>
-void
-LevelSetEquationBinaryMaskTerm<TInput, TLevelSetContainer>::Update()
-{}
-
 template <typename TInput, typename TLevelSetContainer>
 void
 LevelSetEquationBinaryMaskTerm<TInput, TLevelSetContainer>::InitializeParameters()
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.h
index f314d88dad4..68ca7a7e4bf 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.h
@@ -108,7 +108,8 @@ class ITK_TEMPLATE_EXPORT LevelSetEquationCurvatureTerm : public LevelSetEquatio
 
   /** Update the term parameter values at end of iteration */
   void
-  Update() override;
+  Update() override
+  {}
 
   /** Initialize the parameters in the terms prior to an iteration */
   void
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.hxx
index e4a2baa0a65..66aca56d6af 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationCurvatureTerm.hxx
@@ -81,11 +81,6 @@ void
 LevelSetEquationCurvatureTerm<TInput, TLevelSetContainer, TCurvatureImage>::Initialize(const LevelSetInputIndexType &)
 {}
 
-template <typename TInput, typename TLevelSetContainer, typename TCurvatureImage>
-void
-LevelSetEquationCurvatureTerm<TInput, TLevelSetContainer, TCurvatureImage>::Update()
-{}
-
 template <typename TInput, typename TLevelSetContainer, typename TCurvatureImage>
 void
 LevelSetEquationCurvatureTerm<TInput, TLevelSetContainer, TCurvatureImage>::UpdatePixel(
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.h
index cd1fb5fb51d..80c7527bc84 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.h
@@ -92,7 +92,8 @@ class ITK_TEMPLATE_EXPORT LevelSetEquationLaplacianTerm : public LevelSetEquatio
 
   /** Update the term parameter values at end of iteration */
   void
-  Update() override;
+  Update() override
+  {}
 
   /** Initialize the parameters in the terms prior to an iteration */
   void
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.hxx
index 787a967536e..cc22df66bb1 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationLaplacianTerm.hxx
@@ -41,11 +41,6 @@ void
 LevelSetEquationLaplacianTerm<TInput, TLevelSetContainer>::Initialize(const LevelSetInputIndexType &)
 {}
 
-template <typename TInput, typename TLevelSetContainer>
-void
-LevelSetEquationLaplacianTerm<TInput, TLevelSetContainer>::Update()
-{}
-
 template <typename TInput, typename TLevelSetContainer>
 void
 LevelSetEquationLaplacianTerm<TInput, TLevelSetContainer>::UpdatePixel(
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.h
index 0f023d9c152..67ca32067c0 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.h
@@ -94,7 +94,8 @@ class ITK_TEMPLATE_EXPORT LevelSetEquationOverlapPenaltyTerm
 
   /** Update the term parameter values at end of iteration */
   void
-  Update() override;
+  Update() override
+  {}
 
   /** Initialize parameters in the terms prior to an iteration */
   void
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.hxx
index 53d7e0a3f24..fb8c12ceb24 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationOverlapPenaltyTerm.hxx
@@ -32,11 +32,6 @@ LevelSetEquationOverlapPenaltyTerm<TInput, TLevelSetContainer>::LevelSetEquation
   this->m_CacheImage = nullptr;
 }
 
-template <typename TInput, typename TLevelSetContainer>
-void
-LevelSetEquationOverlapPenaltyTerm<TInput, TLevelSetContainer>::Update()
-{}
-
 template <typename TInput, typename TLevelSetContainer>
 void
 LevelSetEquationOverlapPenaltyTerm<TInput, TLevelSetContainer>::UpdatePixel(
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.h
index a17140305b4..4f754007e0d 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.h
@@ -102,7 +102,8 @@ class ITK_TEMPLATE_EXPORT LevelSetEquationPropagationTerm : public LevelSetEquat
 
   /** \todo to be documented. */
   void
-  Update() override;
+  Update() override
+  {}
 
   /** Initialize the parameters in the terms prior to an iteration */
   void
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.hxx
index ec23414fc99..6741fea81e5 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEquationPropagationTerm.hxx
@@ -54,11 +54,6 @@ LevelSetEquationPropagationTerm<TInput, TLevelSetContainer, TPropagationImage>::
   const LevelSetInputIndexType &)
 {}
 
-template <typename TInput, typename TLevelSetContainer, typename TPropagationImage>
-void
-LevelSetEquationPropagationTerm<TInput, TLevelSetContainer, TPropagationImage>::Update()
-{}
-
 template <typename TInput, typename TLevelSetContainer, typename TPropagationImage>
 void
 LevelSetEquationPropagationTerm<TInput, TLevelSetContainer, TPropagationImage>::UpdatePixel(
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.h b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.h
index f472b0a41f1..66f303be02a 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.h
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.h
@@ -140,16 +140,19 @@ class ITK_TEMPLATE_EXPORT LevelSetEvolutionBase : public Object
   /** Initialize the update buffers for all level sets to hold the updates of
    *  equations in each iteration. No-op by default. */
   virtual void
-  AllocateUpdateBuffer();
+  AllocateUpdateBuffer()
+  {}
 
   /** Computer the update at each pixel and store in the update buffer. No-op by
    * default. */
   virtual void
-  ComputeIteration();
+  ComputeIteration()
+  {}
 
   /** Compute the time-step for the next iteration. No-op by default. */
   virtual void
-  ComputeTimeStepForNextIteration();
+  ComputeTimeStepForNextIteration()
+  {}
 
   virtual void
   UpdateLevelSets() = 0;
diff --git a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.hxx b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.hxx
index 35ccd633cc2..6485a1e4d22 100644
--- a/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.hxx
+++ b/Modules/Segmentation/LevelSetsv4/include/itkLevelSetEvolutionBase.hxx
@@ -236,20 +236,5 @@ LevelSetEvolutionBase<TEquationContainer, TLevelSet>::Evolve()
   }
 }
 
-template <typename TEquationContainer, typename TLevelSet>
-void
-LevelSetEvolutionBase<TEquationContainer, TLevelSet>::AllocateUpdateBuffer()
-{}
-
-template <typename TEquationContainer, typename TLevelSet>
-void
-LevelSetEvolutionBase<TEquationContainer, TLevelSet>::ComputeIteration()
-{}
-
-template <typename TEquationContainer, typename TLevelSet>
-void
-LevelSetEvolutionBase<TEquationContainer, TLevelSet>::ComputeTimeStepForNextIteration()
-{}
-
 } // namespace itk
 #endif // itkLevelSetEvolutionBase_hxx