function FakeVTTCue(start, end, text) {
      this.startTime = start;
      this.endTime = end;
      this.text = text;
      this.snapToLines = true;
      this.vertical = undefined;
      this.line = 'auto';
      this.position = 'auto';
    }
@constructor
@param {number} start
@param {number} end
@param {string} text