def METHOD_NAME(self, pid: Hashable, tag: Optional[str] = None) -> None:  # pylint: disable=unused-argument
    """Delete a persisted process checkpoint, where no error will be raised if the checkpoint does not exist.
    :param pid: the process id of the :class:`plumpy.Process`
    :param tag: optional checkpoint identifier to allow retrieving a specific sub checkpoint
    """
    from aiida.orm import load_node
    calc = load_node(pid)
    calc.METHOD_NAME()