static void saveLocally(S variableName) {
  saveLocally(programID(), variableName);
}

static void saveLocally(S progID, S variableName) {
  saveLocally2(mc(), progID, variableName);
}

static void saveLocally2(O obj, S variableName) {
  saveLocally2(obj, programID(), variableName);
}

static synchronized void saveLocally2(O obj, S progID, S variableName) {
  File textFile = new File(programDir(progID), variableName + ".text");
  File structureFile = new File(programDir(progID), variableName + ".structure");
  O x = get(obj, variableName);
  
  if (x == null) {
    textFile.delete();
    structureFile.delete();
  } else if (x instanceof String) {
    saveTextFile(textFile, (S) x);
    structureFile.delete();
  } else {
    saveTextFile(structureFile, structure(x));
    textFile.delete();
  }
}