/**
                            Returns a new promise that will be resolved when all operations have completed.
                            Takes both any numer of values as arguments. If an argument is a not a promise,
                            it will be wrapped in a new promise, same as in `Y.when()`.
                            
                            @for YUI
                            @method batch
                            @param {Any} operation* Any number of Y.Promise objects or regular JS values
                            @return {Promise} Promise to be fulfilled when all provided promises are
                                                resolved
                            **/
                            Y.batch = function () {
                                return Promise.all(slice.call(arguments));
                            };