def subtree_maximum(self, node):
        while node.right_child:
            node = node.right_child
            return node
@return: The root L{WrittenAction}.
dataset/ETHPy150Open christabor/MoAL/MOAL/data_structures/trees/splay_trees.py/SplayTree.subtree_maximum--crossover with--dataset/ETHPy150Open ClusterHQ/eliot/eliot/_parse.py/Task.root