Flutter abstract widget

Widgets are the central class hierarchy in the Flutter framework. A widget is an immutable description of part of a user interface . Widgets can be inflated into elements, which manage the underlying render tree. Widgets themselves have no mutable state (all their fields must be final).

In flutter, the inherited widget is a base class that allows those classes to extend the information under the tree from it . Inherited widgets are also a kind of state management technique. It works by telling registered build references when a change occurs.