What specific information does each node in the element tree structure contain?

In the Flutter widget tree structure, each node contains the following information:

• Widget type — what kind of widget is represented at this node (e.g., Text, Container, Row).
• Widget parameters — properties and settings that define the appearance and behavior of the widget.
• References to child nodes — child widgets nested within the current one.
• Context and state (if it is a StatefulWidget) — data necessary for managing state and interacting with other elements.

Thus, each node describes a specific interface element with its parameters and connections to other elements, forming a UI hierarchy.