public boolean isDeleteSyncSupported() {
    return allDevicesHaveCapability(DeviceCapabilities::deleteSync);
  }
@Test
  void isDeleteSyncSupported() {
    assertTrue(AccountsHelper.generateTestAccount("+18005551234", UUID.randomUUID(), UUID.randomUUID(),
        List.of(deleteSyncCapableDevice),
        "1234".getBytes(StandardCharsets.UTF_8)).isDeleteSyncSupported());
    assertFalse(AccountsHelper.generateTestAccount("+18005551234", UUID.randomUUID(), UUID.randomUUID(),
        List.of(deleteSyncIncapableDevice, deleteSyncCapableDevice),
        "1234".getBytes(StandardCharsets.UTF_8)).isDeleteSyncSupported());
  }