@Test
public void shouldHaveCorrectChildTypes() {

    assertThat( Arrays.asList( this.vdb.getChildTypes() ),
                hasItems( DataRole.IDENTIFIER,
                          Entry.IDENTIFIER,
                          Model.IDENTIFIER,
                          Translator.IDENTIFIER,
                          VdbImport.IDENTIFIER ) );
    assertThat(this.vdb.getChildTypes().length, is(5));
}