{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"if"}]}
        if let AssocItemKind::Fn(box Fn { sig, .. }) = &item.kind {
    fn visit_assoc_item(&mut self, item: &'ast AssocItem, ctxt: AssocCtxt) {
            self.collect_fn_info(sig.header, &sig.decl, item.id, &item.attrs);