Method getParent

src/figtree/treeviewer/ReRootedTree.java:254–259

@param node the node whose parent is requested @return the parent node of the given node, or null if the node is the root node.

(Node node)

     *         if the node is the root node.
     */
    public Node getParent(Node node) {
        if (!(node instanceof ReRootedNode)) {
            throw new IllegalArgumentException("Node, " + node.toString() + " is not an instance of SimpleRootedNode");
        }
        return ((ReRootedNode)node).getParent();
    }

    public Edge getParentEdge(Node node) {
        if (!(node instanceof ReRootedNode)) {