sS getColonProperty(S name, LS lines) {
  if (lines != null) for (S s : lines) {
    s = trim(s);
    if (swic(s, name)) {
      s = trimSubstring(s, l(name));
      if (startsWith(s, ":"))
        ret trimSubstring(s, 1);
    }
  }
  null;
}

sS getColonProperty(S name, S text) {
  ret getColonProperty(name, tlft(text));
}