@Test(expectedExceptions = IllegalArgumentException.class,expectedExceptionsMessageRegExp = ".*praesident.*")
public void compositeTypeWithWrongKey() throws OpenDataException {

    CompositeTypeAndJson taj = new CompositeTypeAndJson(
            STRING,"verein","FCN"
    );
    converter.convertToObject(taj.getType(),"{ \"praesident\": \"hoeness\"}");
}