return typeMerger.mergeTypes(a, b);
Type value = typeMerger.mergeTypes(resultFrame.getValue(slot), otherFrame.getValue(slot)); resultFrame.setValue(slot, value);
	protected Type mergeValues(BetterTypeFrame frame, int slot, Type a, Type b)	        throws DataflowAnalysisException {		try {			return typeMerger.mergeTypes(a, b);		} catch (ClassNotFoundException e) {			lookupFailureCallback.reportMissingClass(e);			throw new DataflowAnalysisException("Missing class for type analysis", e);		}	}