openHeaderSecondary method
      
void
openHeaderSecondary({})
      
     
    
Open header secondary.
duration See ScrollPosition.animateTo.
curve See ScrollPosition.animateTo.
Implementation
void openHeaderSecondary({
  Duration? duration = const Duration(milliseconds: 200),
  Curve curve = Curves.linear,
}) {
  if (_state?._header.secondaryTriggerOffset != null) {
    _state?._callRefresh(
      overOffset: _state!._headerNotifier.secondaryDimension -
          _state!._headerNotifier.actualTriggerOffset,
      duration: duration,
      curve: curve,
    );
  }
}