# Return all module named `name`
	# If such a module does not exist, null is returned (instead of an empty array)
	#
	# Visibility or modules are not considered
	fun get_mmodules_by_name(name: String): nullable Array[MModule]
	do
		if mmodules_by_name.has_key(name) then
			return mmodules_by_name[name]
		else
			return null
		end
	end