constructor() {

		super( 'bounds', null, false );

		/**
		 *
		 * @type {Vector3}
		 * @internal
		 */
		this._size = new external_three_namespaceObject.Vector3( 1, 1, 1 );

		/**
		 *
		 * @type {number}
		 * @internal
		 */
		this._offsetWidth = 0;

		/**
		 *
		 * @type {number}
		 * @internal
		 */
		this._offsetHeight = 0;

		/**
		 *
		 * @type {number}
		 * @internal
		 */
		this._innerWidth = 0;

		/**
		 *
		 * @type {number}
		 * @internal
		 */
		this._innerHeight = 0;

		/**
		 *
		 * @type {number}
		 * @internal
		 */
		this._centerX = 0.5;

		/**
		 *
		 * @type {number}
		 * @internal
		 */
		this._centerY = 0.5;


		this._needsProcess = true;

	}
Sort children according to their .style.order property or fallback on children index

@param {HTMLElementVR} a
@param {HTMLElementVR} b
@return {number}
@private