reset method
void
reset()
Resets the animation to its default dormant/dismissed state.
Implementation
void reset() {
status = AnimationStatus.dismissed;
_startProgress = 0.0;
_transitionStartTimeMs = 0;
_stopwatch?.stop();
_stopwatch = null;
triggerPoint = null;
onUpdate = null;
_lastFrameTimeMs = 0;
}