private static byte packSensitivityIntoFlags(CaseSensitivity sensitivity, byte flags) {
    int sensitivity_flags = sensitivity == CaseSensitivity.UNKNOWN ? 0 : sensitivity == CaseSensitivity.SENSITIVE ? 1 : 2;
    flags |= sensitivity_flags << CASE_SENSITIVITY_SHIFT;
    return flags;
  }
private static byte packSensitivityIntoFlags(CaseSensitivity sensitivity, byte flags)