{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"ProcMacroServerChoice::Explicit(path)"}]}
        ProcMacroServerChoice::Explicit(path) => {
            .map_err(|e| (e, true)),
            ProcMacroClient::spawn(path, extra_env).map_err(Into::into).map_err(|e| (e, true))