FreeMessageRangeStrings gets the free MessageRange strings for the target files.

ImageFilteredByTypes returns a minimal image containing only the descriptors required to define those types.

ImageFilteredByTypesWithOptions returns a minimal image containing only the descriptors required to define those types.

StripSourceRetentionOptions strips any options with a retention of "source" from the descriptors in the given image.

WithAllowFilterByImportedType returns an option for ImageFilteredByTypesWithOptions that allows a named filter type to be in an imported file or module.

WithExcludeCustomOptions returns an option that will cause an image filtered via ImageFilteredByTypesWithOptions to *not* include custom options unless they are explicitly named in the list of filter types.

WithExcludeKnownExtensions returns an option that will cause an image filtered via ImageFilteredByTypesWithOptions to *not* include the known extensions for included extendable messages unless they are explicitly named in the list of filter types.

ErrImageFilterTypeIsImport is returned from ImageFilteredByTypes when a specified type name is declared in a module dependency.

ErrImageFilterTypeNotFound is returned from ImageFilteredByTypes when a specified type cannot be found in an image.

ImageFilterOption is an option that can be passed to ImageFilteredByTypesWithOptions.