CenteredBinarySplitter
constructor(enclosement: IntRectangle, invert: Boolean = true, constraints: (node: PackNode, rectangle: IntRectangle) -> Boolean = { _, _ -> true }, xcon: (node: PackNode, rectangle: IntRectangle) -> Boolean = { _, _ -> true }, ycon: (node: PackNode, rectangle: IntRectangle) -> Boolean = { _, _ -> true })(source)