If you want to looking for specific type of ancestor widget (yes, parent widget) you can use following methods below.

find_parent_widget_with_specific_type.dart

// If you're familair with 'parent' term, Flutter call its as 'ancestor'

import 'package:flutter/material.dart';

class NextflowExampleFindParentWidget extends StatefulWidget {
  NextflowExampleFindParentWidget({Key? key}) : super(key: key);

  @override
  _NextflowExampleFindParentWidgetState createState() =>
      _NextflowExampleFindParentWidgetState();
}

class _NextflowExampleFindParentWidgetState
    extends State<NextflowExampleFindParentWidget> {
  Widget _targetParentOrAncestor = Widget();

  @override
  Widget build(BuildContext context) {
    // This method will pass this widget's ancestor (yes, parent) one by one, according to widget tree
    context.visitAncestorElements((element) {
      var parentWidget = element.widget;

      // for example, we are looking for ListView that is higher in Widget tree
      if (parentWidget is ListView) {
        _targetParentOrAncestor = parentWidget;
        return false;
      }

      return true;
    });

    return Container();
  }
}