Make the class hierarchy discovery protected #57
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This allows subclasses to extend/override the behaviour when finding a class hierarchy from a class name, without reimplementing
getMetadataForClass()
.This doesn't necessarily imply these methods are part of a stable API - you might use something like Symfony's
@api
to do so in the future, if you want to make it clear that protected APIs aren't considered part of the stable API. (This is a nice description of that approach.)This is one way to fix #54