human
I wrote the below code

    env = app.builder.env
    crawled = {}
    def crawl_toc(node, depth=1):
        crawled[node] = True
        for (j, subnode) in enumerate(node):
            try:
                if (isinstance(subnode, autosummary_toc) and isinstance(subnode[0], addnodes.toctree)):
                    env.note_toctree(env.docname, subnode[0])
                    continue
            except IndexError:
                continue
            if (not isinstance(subnode, nodes.section)):
                continue
            if (subnode not in crawled):
                crawl_toc(subnode, (depth + 1))
    crawl_toc(doctree)

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

def process_autosummary_toc(app, doctree):