Argument arg1 = (Argument)args.get(0); Argument arg2 = (Argument)args.get(1);
	public Argument evaluate(ContextStack context, Argument arg1, Argument arg2)		throws MapyrusException	{		Argument retval = null;		String format = arg1.getStringValue();		try		{			DecimalFormat df = new DecimalFormat(format, symbols);			double d = arg2.getNumericValue();			retval = new Argument(Argument.STRING, df.format(d));		}		catch (IllegalArgumentException e)		{			throw new MapyrusException(e.getMessage());		}		return(retval);	}