assertEquals( set( "a", "b", "c" ), possibleValuesService.values() );
final TestElement.Item d = external.getItemList1().insert();
d.setName( "d" );
assertEquals( set( "a", "b", "c", "d" ), possibleValuesService.values() );
assertValidationOk( element.getExternalReference() );
d.getName().write( "dd", true );
assertEquals( set( "a", "b", "c", "dd" ), possibleValuesService.values() );