@Override
  protected Set<StepField> getUsedFields( GetXMLDataMeta meta ) {
    Set<StepField> usedFields = new HashSet<>();
    if ( meta.isInFields() ) {
      Set<StepField> stepFields = createStepFields( meta.getXMLField(), getInputs() );
      usedFields.addAll( stepFields );
    }
    return usedFields;
  }
@Test
  public void testGetUsedFields_xmlNotInField() throws Exception {
    when( meta.isInFields() ).thenReturn( false );
    Set<StepField> usedFields = analyzer.getUsedFields( meta );
    assertEquals( 0, usedFields.size() );
  }