extended nested scroll view to fix following issues. 1.pinned sliver header issue 2.inner scrollables in tabview sync issue 3.pull to refresh is not work. 4.do without ScrollController in NestedScrollView's body
════════ Exception caught by animation library ═════════════════════════════════
The following assertion was thrown while notifying listeners for AnimationController:
'package:extended_nested_scroll_view/src/extended_nested_scroll_view.dart': Failed assertion: line 1760 pos 9: 'result': is not true.
package:extended_nested_scroll_view/src/extended_nested_scroll_view.dart:1760
════════ Exception caught by animation library ═════════════════════════════════ The following assertion was thrown while notifying listeners for AnimationController: 'package:extended_nested_scroll_view/src/extended_nested_scroll_view.dart': Failed assertion: line 1760 pos 9: 'result': is not true. package:extended_nested_scroll_view/src/extended_nested_scroll_view.dart:1760
When the exception was thrown, this was the stack
2 _NestedOuterBallisticScrollActivity.applyMoveTo
package:extended_nested_scroll_view/src/extended_nested_scroll_view.dart:1760
3 BallisticScrollActivity._tick
package:flutter/…/widgets/scroll_activity.dart:553
4 AnimationLocalListenersMixin.notifyListeners
package:flutter/…/animation/listener_helpers.dart:155
5 AnimationController._tick
package:flutter/…/animation/animation_controller.dart:830
6 Ticker._tick
package:flutter/…/scheduler/ticker.dart:238
7 SchedulerBinding._invokeFrameCallback
package:flutter/…/scheduler/binding.dart:1146
8 SchedulerBinding.handleBeginFrame.
package:flutter/…/scheduler/binding.dart:1059