(function() {
    'use strict';
    /**
     * Group constructor.  Groups are used to contain shapes or other groups.
     * @constructor
     * @memberof Konva
     * @augments Konva.Container
     * @param {Object} config
     * @@nodeParams
     * @@containerParams
     * @example
     * var group = new Konva.Group();
     */
    Konva.Group = function(config) {
        this.___init(config);
    };

    Konva.Util.addMethods(Konva.Group, {
        ___init: function(config) {
            this.nodeType = 'Group';
            // call super constructor
            Konva.Container.call(this, config);
        },
        _validateAdd: function(child) {
            var type = child.getType();
            if (type !== 'Group' && type !== 'Shape') {
                Konva.Util.throw('You may only add groups and shapes to groups.');
            }
        }
    });
    Konva.Util.extend(Konva.Group, Konva.Container);

    Konva.Collection.mapMethods(Konva.Group);
})();