tween method

Implementation

Do tween([time]) {
  Do.setup();
  Do.add(this);

  _startTime = time ?? DateTime.now().millisecondsSinceEpoch;
  _startTime += _delayTime;

  for (var property in _valuesEnd.keys) {
    if (_object[property] == null) {
      continue;
    }

    _valuesStart[property] = _object[property];
  }

  return this;
}