# Is this classed marked `serialize`? in part or fully?
	#
	# This method returns 3 possible values:
	# * `null`, this class is not to be serialized.
	# * `true`, the attributes of this class are to be serialized by default.
	# * `false`, the attributes of this class are to be serialized on demand only.
	fun how_serialize: nullable Bool
	do
		# Is there a declaration on the classdef or the module?
		var serialize = is_serialize

		if not serialize and not is_noserialize then
			# Is the module marked serialize?
			serialize = parent.as(AModule).is_serialize
		end

		if serialize then return true

		if not serialize then
			# Is there an attribute marked serialize?
			for npropdef in n_propdefs do
				if npropdef.is_serialize then
					return false
				end
			end
		end

		return null
	end