How to get the parent widget of a widget?

UPanelWidget ... Gets the parent widget of a given widget, and potentially the child index. TFunctionRef < void *)> ... Iterates through all widgets including widgets contained in named slots, other than investigating named slots, this code does not dive into foreign WidgetTrees, as would exist inside another user widget.
In addition, how are parent widgets and child widgets related?
– Widgets that are stored in the parent widget are called child or child Widgets. Consider a small example of standard code that is automatically generated when a new project is created. Scaffold widget is a parent widget for Center, and Center, in turn, is a parent widget for Column. Accordingly, Column is a child widget for Center.
Also, is there a way to use child 2 widget? Because the Child 2 Widget is not built yet (we are using tabs and Child 1 widget is the current) Using InheritedWidget to store the value is the best option. Change the tab from Child 1 widget to Child 2 widget.
Next, how to restore data from a parent widget?
Create a method on the Child1 widget which will refresh the Widget with the new value. Call the method defined in Child1State from Parent Widget. Using InheritedWidget to store the data from Parent Widget and restore the data from Child1 Widget.
Likewise, how to pass a tabcontroller to a child widget?
Pass the tabController as a parameter from Parent Widget to Child 1 Widget. Pass a callBack from Parent to Child 1 Widget and change the index of the controller. Set the tabController inside InheritedWidget , call it from Child 1 Widget and change the index of the controller.

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