public long getCommandSequenceNumber() {
    return commandSequenceNumber;
  }
@Test
  public void shouldHandleNullSequenceNumber() {
    // When:
    final CommandStatusEntity entity =
        new CommandStatusEntity(STATEMENT_TEXT, COMMAND_ID, COMMAND_STATUS, null);

    // Then:
    assertThat(entity.getCommandSequenceNumber(), is(-1L));
  }