def node_multiplier(self, multiplier=<NUM_LIT:0.5>, seed=None):
random.seed(seed)<EOL>ctree = self._ttree.copy()<EOL>low, high = sorted([multiplier, <NUM_LIT:1.> / multiplier])<EOL>mult = random.uniform(low, high)<EOL>for node in ctree.treenode.traverse():<EOL><INDENT>node.dist = node.dist * mult<EOL><DEDENT>ctree._coords.update()<EOL>return ctree<EOL>
Returns a toytree copy with all nodes multiplied by a constant 
sampled uniformly between (multiplier, 1/multiplier).