{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"el.into_token().and_then(ast::Comment::cast).filter(ast::Comment::is_doc)"}]}
            el.into_token().and_then(ast::Comment::cast).filter(ast::Comment::is_doc)
        self.iter.by_ref().find_map(|el| {
        })