code: 	public ReturnValueDescriptor asDescriptor(boolean defaultGroupSequenceRedefined, List<Class<?>> defaultGroupSequence) {
  		return new ReturnValueDescriptorImpl(
  				getType(),
  				asDescriptors( getConstraints() ),
  				isCascading(),
  				defaultGroupSequenceRedefined,
  				defaultGroupSequence,
  				groupConversionHelper.asDescriptors()
  		);
  	}
  