assertEquals( "dd", reference.content() );
assertValidationOk( reference );
d.getName().write( "ddd", false );
assertEquals( set( "a", "b", "c", "ddd" ), possibleValuesService.values() );
assertEquals( "dd", reference.content() );
assertValidationError( reference, "Could not resolve " + referenceLabel + " \"dd\"" );
reference.write( "ddd" );