"""Compute descriptive statistics related to mDLAG models."""

from __future__ import annotations

_NOT_IMPLEMENTED_MSG = "mDLAG not yet implemented"


def predictive_performance():
    """Compute the leave-group-out predictive performance of a mDLAG model.

    Raises
    ------
    NotImplementedError
        mDLAG is not yet implemented.
    """
    raise NotImplementedError(_NOT_IMPLEMENTED_MSG)
