synchronized final void setParent(GTreeNode parent) {
		this.parent = parent;
	}
Sets the parent of this node.  This method should only be used by a parent
node when a new child is added to that parent node.
@param parent the node that this node is being added to.
Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/CoreGTreeNode.java