{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"sema.ancestors_with_macros(fn_body.syntax().clone()).find_map(ast::Impl::cast)"}]}
        sema.ancestors_with_macros(fn_body.syntax().clone()).find_map(ast::Impl::cast)
    if let Some(imp) =
    {