code: function bufferCount(bufferSize, startBufferEvery) {
  	    if (startBufferEvery === void 0) { startBufferEvery = null; }
  	    return this.lift(new BufferCountOperator(bufferSize, startBufferEvery));
  	}
docs: Buffers the source Observable values until the size hits the maximum
  `bufferSize` given.
  
  <span class="informal">Collects values from the past as an array, and emits
  that array only when its size reaches `bufferSize`.</span>
  
  <img src="./img/bufferCount.png" width="100%">
  
  Buffers a number of values from the source Observable by `bufferSize` then
  emits the buffer and clears it, and starts a new buffer each
  `startBufferEvery` values. If `startBufferEvery` is not provided or is
  `null`, then new buffers are started immediately at the start of the source
  and when each buffer closes and is emitted.
  
  @example <caption>Emit the last two click events as an array</caption>
  var clicks = Rx.Observable.fromEvent(document, 'click');
  var buffered = clicks.bufferCount(2);
  buffered.subscribe(x => console.log(x));
  
  @example <caption>On every click, emit the last two click events as an array</caption>
  var clicks = Rx.Observable.fromEvent(document, 'click');
  var buffered = clicks.bufferCount(2, 1);
  buffered.subscribe(x => console.log(x));
  
  @see {@link buffer}
  @see {@link bufferTime}
  @see {@link bufferToggle}
  @see {@link bufferWhen}
  @see {@link pairwise}
  @see {@link windowCount}
  
  @param {number} bufferSize The maximum size of the buffer emitted.
  @param {number} [startBufferEvery] Interval at which to start a new buffer.
  For example if `startBufferEvery` is `2`, then a new buffer will be started
  on every other value from the source. A new buffer is started at the
  beginning of the source by default.
  @return {Observable<T[]>} An Observable of arrays of buffered values.
  @method bufferCount
  @owner Observable