reset method
void
reset()
Implementation
void reset() {
_gestureConfig = widget
.extendedImageState.imageWidget.initGestureConfigHandler
?.call(widget.extendedImageState) ??
GestureConfig();
gestureDetails = GestureDetails(
totalScale: _gestureConfig!.initialScale,
offset: Offset.zero,
)..initialAlignment = _gestureConfig!.initialAlignment;
}