code: function delay(delay, scheduler) {
  	    if (scheduler === void 0) { scheduler = async_1.async; }
  	    var absoluteDelay = isDate_1.isDate(delay);
  	    var delayFor = absoluteDelay ? (+delay - scheduler.now()) : Math.abs(delay);
  	    return this.lift(new DelayOperator(delayFor, scheduler));
  	}
docs: Delays the emission of items from the source Observable by a given timeout or
  until a given Date.
  
  <span class="informal">Time shifts each item by some specified amount of
  milliseconds.</span>
  
  <img src="./img/delay.png" width="100%">
  
  If the delay argument is a Number, this operator time shifts the source
  Observable by that amount of time expressed in milliseconds. The relative
  time intervals between the values are preserved.
  
  If the delay argument is a Date, this operator time shifts the start of the
  Observable execution until the given date occurs.
  
  @example <caption>Delay each click by one second</caption>
  var clicks = Rx.Observable.fromEvent(document, 'click');
  var delayedClicks = clicks.delay(1000); // each click emitted after 1 second
  delayedClicks.subscribe(x => console.log(x));
  
  @example <caption>Delay all clicks until a future date happens</caption>
  var clicks = Rx.Observable.fromEvent(document, 'click');
  var date = new Date('March 15, 2050 12:00:00'); // in the future
  var delayedClicks = clicks.delay(date); // click emitted only after that date
  delayedClicks.subscribe(x => console.log(x));
  
  @see {@link debounceTime}
  @see {@link delayWhen}
  
  @param {number|Date} delay The delay duration in milliseconds (a `number`) or
  a `Date` until which the emission of the source items is delayed.
  @param {Scheduler} [scheduler=async] The Scheduler to use for
  managing the timers that handle the time-shift for each item.
  @return {Observable} An Observable that delays the emissions of the source
  Observable by the specified timeout or Date.
  @method delay
  @owner Observable