@Override
	void removeNode(Node node) {
		if (node == child1) {
			parent.replaceNode(this, child2);
		}
		else if (node == child2) {
			parent.replaceNode(this, child1);
		}
	}
Constructs a new SplitNode from the XML JDOM element
@param elem the XML JDOM element containing the configuration information.
@param mgr the DockingWindowsManager for this node.
@param parent the parent node for this node.
@param restoredPlaceholders the list into which any restored placeholders will be placed
Ghidra/Framework/Docking/src/main/java/docking/SplitNode.java