static O rpc(S botName, S method, O... args) {
  ret unstructure_matchOK2OrFail(
    sendToLocalBot(botName, rpc_makeCall(method, args)));
}

static O rpc(DialogIO bot, S method, O... args) {
  ret unstructure_matchOK2OrFail(
    bot.ask(rpc_makeCall(method, args)));
}

static S rpc_makeCall(S method, O... args) {
  if (empty(args))
    ret "call " + method;
  ret format("call *", concatLists((L) ll(method), asList(args)));
}