tree property
final
The list of TreeSliverNodes that may be displayed in the TreeSliver.
Beyond root nodes, whether or not a given TreeSliverNode is displayed depends on the TreeSliverNode.isExpanded value of its parent. The TreeSliver will set the TreeSliverNode.parent and TreeSliverNode.depth as nodes are built on demand to ensure the integrity of the tree.
Implementation
final List<TreeSliverNode<T>> tree;