AddCompat initializes Compat to implement the obsolete parts of types.ImageSource for implementations of private.ImageSource.

PropertyMethods creates an PropertyMethodsInitialize for vals.

Compat implements the obsolete parts of types.ImageSource for implementations of private.ImageSource.

DoesNotAffectLayerInfosForCopy implements LayerInfosForCopy() that returns nothing.

NoSignatures implements GetSignatures() that returns nothing.

Properties collects properties of an ImageSource that are constant throughout its lifetime (but might differ across instances).

PropertyMethodsInitialize implements parts of private.ImageSource corresponding to Properties.