code: function (emitter, eventPrefix) {
          var self = this,
              oldEmit = emitter.emit;
  
          eventPrefix = eventPrefix || '';
  
          emitter.emit = function (name, data) {
              oldEmit.apply(emitter, arguments);
              self.send(eventPrefix + name, data);
          };
          return this;
      }
docs: Send emitted events from an event emitter on event stream with prefix
  @param {events.EventEmitter} emitter - Event Emitter
  @param {string} [eventPrefix=""] - Prefix events with this prefix on event stream
  @returns {EventStream}