code: function shout(name) {
      pagelet.bigpipe.emit.apply(pagelet.bigpipe, [
        name.join(':'),
        pagelet
      ].concat(Array.prototype.slice.call(arguments, 1)));
  
      return pagelet;
    }
docs: Broadcast the event with namespaced name.
  
  @param {String} name Event name.
  @returns {Pagelet}
  @api private