protected Constant mergeValues( ConstantFrame frame, int slot, Constant a, Constant b) throws DataflowAnalysisException { return Constant.merge(a, b);
protected void mergeValues(ConstantFrame otherFrame, ConstantFrame resultFrame, int slot) throws DataflowAnalysisException { Constant value = Constant.merge(resultFrame.getValue(slot), otherFrame.getValue(slot)); resultFrame.setValue(slot, value);
	protected Constant mergeValues(			ConstantFrame frame,			int slot,			Constant a,			Constant b) throws DataflowAnalysisException {		return Constant.merge(a, b);	}