isActive method

bool isActive(
  1. TreeSliverNode<Object?> node
)

Whether or not the given TreeSliverNode is enclosed within its parent TreeSliverNode.

If the TreeSliverNode.parent isExpanded, or this is a root node, the given node is active and this method will return true. This does not reflect whether or not the node is visible in the Viewport.

Implementation

bool isActive(TreeSliverNode<Object?> node) {
  assert(_state != null);
  return _state!.isActive(node);
}