ok.js
function () {
		var items = _.flatten(arguments);
		for (var i = 0, l = items.length; i < l; i++) {
			this.addItem(items[i], this.items.length);
		}
	}
function () {
		var items = _.flatten(arguments);
		for (var i = 0, l = items.length; i < l; i++) {
			this.addItem(items[i], this.items.length);
		}
	}
function ( ) { var items = _ . flatten ( arguments ) ; for ( var i = 0 , l = items . length ; i < l ; i ++ ) { this . addItem ( items [ i ] , this . items . length ) ; } }
Add one or more items
@param {*|Array.<*>} items A single item or array of items which will be
added to this collection
@fires add
Add one or more items