# Windows can't actually be 0x0 in size, they must be at least 1x1
	# but passing 0 for width and height is OK, resulting in a 1x1 default size.
	# params width in pixels, or -1 to unset the default width
	# params height in pixels, or -1 to unset the default height
	fun default_size(width: Int, height: Int) `{
		gtk_window_set_default_size(self, width, height);
	`}