def get_model_relation_fields(self, use_alias: bool = False) -> str:
        """
        Extract names of the database columns or model fields that are connected
        with given relation based on use_alias switch and which side of the relation
        the current field is - reverse or normal.

        :param use_alias: use db names aliases or model fields
        :type use_alias: bool
        :return: name or names of the related columns/ fields
        :rtype: Union[str, List[str]]
        """
        if use_alias:
            return self._get_model_relation_fields_alias()
        return self._get_model_relation_fields_name()

        Extract names of the database columns or model fields that are connected
        with given relation based on use_alias switch and which side of the relation
        the current field is - reverse or normal.

        :param use_alias: use db names aliases or model fields
        :type use_alias: bool
        :return: name or names of the related columns/ fields
        :rtype: Union[str, List[str]]
        
ormar/fields/foreign_key.py