@Override
  public DropStatement withoutDeleteClause() {
    return new DropStream(getLocation(), getName(), getIfExists(), false);
  }
@Test
  public void shouldCopyWithoutDeleteTopic() {
    // Given:
    final DropStream table = new DropStream(SOME_NAME, true, true);

    // When:
    final DropStream result = (DropStream) table.withoutDeleteClause();

    // Then:
    assertThat(result, is(new DropStream(SOME_NAME, true, false)));
  }