human
I wrote the below code

    def FindFirstLeaf(node):
        if isinstance(node, pytree.Leaf):
            return node
        return FindFirstLeaf(node.children[0])
    pytree_utils.SetNodeAnnotation(FindFirstLeaf(node), pytree_utils.Annotation.MUST_SPLIT, True)

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def _SetMustSplitOnFirstLeaf(node):