Provides the set of base classes for the JavaFX Scene Graph API.

This package includes the Scene class, which defines the scene to be rendered. It also includes the base Node class, a Group class that contains a sequence of child nodes for rendering, and a CustomNode class for defining Node subclasses that create internal nodes as content.

Nodes are connected in a scene graph, which is a tree-like data structure where each item in the tree has zero or one parent. Each node is either a "leaf" node with no child nodes or a "branch" with zero or more child nodes.