code: function Timer(timer, clear, fn) {
        this.clear = clear;
        this.timer = timer;
        this.fns = [fn];
      }
docs: Timer instance.
  
  @constructor
  @param {Object} timer New timer instance.
  @param {Function} clear Clears the timer instance.
  @param {Function} fn The functions that need to be executed.
  @api private