{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":".and_then(|it|"}]}
            .and_then(|it| ProcMacroClient::spawn(&it, extra_env).map_err(Into::into))
            .find_sysroot_proc_macro_srv()
            .map_err(|e| (e, true)),