(self)
return [self.column_id]
Used as an abstraction layer for columns that can contain more than one data column
        (for example, PercentageColumns).
Used as an abstraction layer for columns that can contain more than one data column
        (for example, PercentageColumns).
Used as an abstraction layer for columns that can contain more than one data column ( for example PercentageColumns ) .
def get_column_ids(self):
        """
        Used as an abstraction layer for columns that can contain more than one data column
        (for example, PercentageColumns).
        """
        return [self.column_id]
def get_column_ids ( self ) : return [ self . column_id ]