code: function(evt, forceFlush){
      this.eventQueue.push(evt);
      if (this.eventQueue.length >= this.maxQueueSize || forceFlush){
        this.flush();
      }
    }
docs: Push event into the pending queue
  @param {Object} evt the event to send to the events service
  @param {Boolean} forceFlush indicates that the event queue should be flushed after adding this event regardless of size of the queue
  @private