OptionGroup - different hint per option

Is there a way to have a different hint per option?

For instance, my current code is as follows:

		for( TimePhasedRelatedParts relatedPartType : TimePhasedRelatedParts.values() )
		{
			addItem(relatedPartType);
			setItemCaption(relatedPartType, relatedPartType.getDescription());
		}
		addStyleName(ValoTheme.OPTIONGROUP_HORIZONTAL);

		setDescription(
				"Parts of Same Group: Parts that are likely to be scheduled to be produced within the same " +
				"manufacturing lot.  All Derivatives: One example is different sizes of the same Part." );

What I really want is to have “Parts that are likely to be scheduled to be produced within the same manufacturing lot.” for one of the options and “One example is different sizes of the same Part.” for the another option. I don’t see anything in the API, but thought there might be a way I am missing.