/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2018 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */
declare function hasGetStart(def: any): boolean;
declare function hasGetEnd(def: any): boolean;
declare function hasGetters(def: any): boolean;
/**
 * [description]
 *
 * @function Phaser.Tweens.Builders.GetValueOp
 * @since 3.0.0
 *
 * @param {string} key - [description]
 * @param {*} propertyValue - [description]
 *
 * @return {function} [description]
 */
declare var GetValueOp: (key: any, propertyValue: any) => any;