Metricsv4 → Filtering Relation

File in ITK/Modules/Registration/Metricsv4	Includes file in ITK/Modules/Filtering
include / itkDefaultImageToImageMetricTraitsv4.h	ImageGradient / include / itkGradientRecursiveGaussianImageFilter.h
include / itkImageToImageMetricv4.h	ImageGrid / include / itkResampleImageFilter.h
include / itkVectorImageToImageMetricTraitsv4.h	ImageGradient / include / itkGradientRecursiveGaussianImageFilter.h