# Collect mmethods inherited by 'self' if accepted by `filter`.
	fun collect_inherited_mmethods(mainmodule: MModule, filter: ModelFilter): Set[MMethod] do
		var res = new HashSet[MMethod]
		for mproperty in collect_inherited_mproperties(mainmodule, filter) do
			if not filter.accept_mentity(mproperty) then continue
			if mproperty isa MMethod then res.add(mproperty)
		end
		return res
	end