# Collect not defined properties
	fun collect_not_define_properties(filter: ModelFilter):Set[MMethodDef] do
		var set = new HashSet[MMethodDef]
		for mpropdef in collect_abstract_methods(filter) do
			var redef_count = 0
			for mprop in mpropdef.mproperty.mpropdefs do
				if mprop.is_abstract then continue
				redef_count += 1
			end
			if redef_count == 0 then set.add(mpropdef)
		end
		return set
	end