Problem Statement
What is the Widget tree in Flutter?
Explanation
The Widget tree is a hierarchical structure where each widget describes part of the user interface and can contain child widgets, creating a tree from the root widget down to leaf widgets like Text or Image. Widgets are immutable configurations that describe what the UI should look like for the current state.
When you write Flutter code, you're building this widget tree by composing smaller widgets into larger ones. For example, a Scaffold widget might contain an AppBar widget and a Column widget, which contains Text and Button widgets as children. This composition pattern makes Flutter UIs declarative and easy to understand.
The widget tree is lightweight and gets rebuilt frequently when state changes, which is efficient because widgets are just configurations. Flutter creates corresponding Element and RenderObject trees from the widget tree to actually display the UI on screen, but the widget tree itself is just the blueprint that describes the desired UI structure.
