Determine whether beforeDraw and afterDraw should be called for the given node.
By default, this is used to filter out all nodes except for startNode and its children, and to keep
the action from starting in the middle of the tree.
Subclasses may change this to adjust this behavior.
Determine whether beforeDraw and afterDraw should be called for the given node.
By default, this is used to filter out all nodes except for startNode and its children, and to keep the action from starting in the middle of the tree. Subclasses may change this to adjust this behavior.