sO subBot_serveText(O s) {
  ret call(getMainBot(), "serveByteArray", toUtf8(str(s)), "text/plain; charset=utf8");
}

sO subBot_serveText(InputStream in) {
  ret subBot_serveInputStream(in, "text/plain; charset=utf8");
}

sO subBot_serveText(File f) {
  ret subBot_serveFile(f, "text/plain; charset=utf8");
}