protected String evalAsString( IBaseExpression expr, IResultIterator result )
protected String evalAsString( String name, IResultIterator result )
	protected String evalAsString( IBaseExpression expr, IResultIterator result )	{		try		{			Object val = result.getValue( expr );			if ( val == null )				return "<null>";			else				return val.toString( );		}		catch ( Exception e )		{			// Not all expressions can be evaluated in all rows			// Print an error if it cannot be			return "<EXCEPTION>";		}	}