Sets the group by information for this widget to the inputed grouping
        options.  This can be either a list of strings, or a comma deliminated
        string.
        
        :param      groupBy | <str> || [<str>, ..]

def setGroupBy( self, groupBy ):
        """
        Sets the group by information for this widget to the inputed grouping
        options.  This can be either a list of strings, or a comma deliminated
        string.
        
        :param      groupBy | <str> || [<str>, ..]
        """
        if ( type(groupBy) in (list, tuple) ):
            groupBy = ','.join(map(str, groupBy))
        
        self.uiGroupingTXT.setText(groupBy)