src/fixed-game-loop.js
function() {
    if (this._initialized && this._isPaused) {
      return false;
    }

    this._isPaused = true;
    raf.cancel(this._requestID);

    this._pauseTime = now();
    this._onPause();

    return true;
  }
function() {
    if (this._initialized && this._isPaused) {
      return false;
    }

    this._isPaused = true;
    raf.cancel(this._requestID);

    this._pauseTime = now();
    this._onPause();

    return true;
  }
function ( ) { if ( this . _initialized && this . _isPaused ) { return false ; } this . _isPaused = true ; raf . cancel ( this . _requestID ) ; this . _pauseTime = now ( ) ; this . _onPause ( ) ; return true ; }
pauses the timer
pauses the timer