public void markStale() {
    stale = true;
  }
@Test
  void stale() {
    final Account account = AccountsHelper.generateTestAccount("+14151234567", UUID.randomUUID(), UUID.randomUUID(), Collections.emptyList(),
        new byte[0]);

    assertDoesNotThrow(account::getNumber);

    account.markStale();

    assertThrows(AssertionError.class, account::getNumber);
    assertDoesNotThrow(account::getUuid);
  }