(self, data_source_config=None, lang=None)
Get database fields associated with this column. Could be one, or more
        if a column is a function of two values in the DB (e.g. PercentageColumn)
Get database fields associated with this column. Could be one, or more
        if a column is a function of two values in the DB (e.g. PercentageColumn)
Get database fields associated with this column . Could be one or more if a column is a function of two values in the DB ( e . g . PercentageColumn )
def get_fields(self, data_source_config=None, lang=None):
        """
        Get database fields associated with this column. Could be one, or more
        if a column is a function of two values in the DB (e.g. PercentageColumn)
        """
        raise NotImplementedError('subclasses must override this')
def get_fields ( self , data_source_config = None , lang = None ) : raise NotImplementedError ( 'subclasses must override this' )