@Override
  public MaterializedWindowedTable windowed() {
    return new KsqlMaterializedWindowedTable(inner.windowed());
  }
@Test
  public void shouldWrappedWindowed() {
    // Given:
    givenNoopTransforms();

    // When:
    final MaterializedWindowedTable table = materialization.windowed();

    // Then:
    assertThat(table, is(instanceOf(KsqlMaterializedWindowedTable.class)));
  }