# Request a resorting of this sprite in its sprite list
	#
	# Resorting is required when `static` or the root of `texture` changes.
	# This is called automatically when such changes are detected.
	# However, it can still be set manually if a modification can't be
	# detected or by subclasses.
	fun needs_remap
	do
		var l = sprite_set
		if l != null then l.sprites_to_remap.add self
	end