/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2018 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */
/**
 * Returns the circumference of the given Circle.
 *
 * @function Phaser.Geom.Circle.Circumference
 * @since 3.0.0
 *
 * @param {Phaser.Geom.Circle} circle - The Circle to get the circumference of.
 *
 * @return {number} The circumference of the Circle.
 */
declare var Circumference: (circle: any) => number;