Header file CAAFBuiltinDefs contains a list of
TYPE_DEF_METHODs etc., with a corresponding list in
ImplAAFBuiltinDefs. However, CLASS_DEF_METHOD
(GPITrigger) is missing from the list in
ImplAAFBuiltinDefs. I tried adding it this morning and
then stepped through the code to test it and it seemed
to do all the right things. Just an oversight maybe?