def __init__(self, postgresql: 'Postgresql', config: Dict[str, Union[str, int]]) -> None:
        """Init method for :class:`AbstractMPPHandler`.

        :param postgresql: a reference to :class:`Postgresql` object.
        :param config: configuration of MPP section.
        """
        super().__init__(config)
        self._postgresql = postgresql
Init method for :class:`AbstractMPPHandler`.

        :param postgresql: a reference to :class:`Postgresql` object.
        :param config: configuration of MPP section.
        
patroni/postgresql/mpp/__init__.py