Contain all AST-parts related to object mechanisms the propdef has:

instantiation, method dispatch, attribute access, subtyping-test

Property definitions

nitc :: ssa $ APropdef :: object_sites=
	# Contain all AST-parts related to object mechanisms the propdef has:
	# instantiation, method dispatch, attribute access, subtyping-test
	var object_sites: Array[AExpr] = new Array[AExpr]
src/ssa.nit:211,2--213,50