# Source: physics/p2/CollisionGroup.js

    /**
    * @author       Richard Davey <rich@photonstorm.com>
    * @copyright    2014 Photon Storm Ltd.
    * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
    */

    /**
    * Collision Group
    *
    * @class Phaser.Physics.P2.CollisionGroup
    * @classdesc Physics Collision Group Constructor
    * @constructor
    */
    Phaser.Physics.P2.CollisionGroup = function (bitmask) {

        /**
        * @property {number} mask - The CollisionGroup bitmask.
        */
        this.mask = bitmask;

    };