{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"closure.syntax().ancestors().find_map(ast::AnyHasGenericParams::cast).and_then("}]}
        closure.syntax().ancestors().find_map(ast::AnyHasGenericParams::cast).and_then(
    let Some((container_params, container_where, container)) =
            |container| {