private static VM_Type findTypeOfTIBSlot (int tibSlot) {
private static VM_Type findTypeOfTIBSlot (Offset tibOff) {
  private static VM_Type findTypeOfTIBSlot (int tibSlot) {    // search for a type that this is the TIB for    VM_Type[] types = VM_Type.getTypes();    for (int i = FIRST_TYPE_DICTIONARY_INDEX; i < types.length; ++i) {      if (types[i] != null && types[i].getTibSlot() == tibSlot)         return types[i];    }    return null;  }