contentBuilder method Null safety

Widget contentBuilder(
  1. BuildContext context,
  2. RefreshMode refreshState,
  3. double pulledExtent,
  4. double refreshTriggerPullDistance,
  5. double refreshIndicatorExtent,
  6. AxisDirection axisDirection,
  7. bool float,
  8. Duration? completeDuration,
  9. bool enableInfiniteRefresh,
  10. bool success,
  11. bool noMore
)

Implementation

Widget contentBuilder(
    BuildContext context,
    RefreshMode refreshState,
    double pulledExtent,
    double refreshTriggerPullDistance,
    double refreshIndicatorExtent,
    AxisDirection axisDirection,
    bool float,
    Duration? completeDuration,
    bool enableInfiniteRefresh,
    bool success,
    bool noMore);