def METHOD_NAME(
    target: np.ndarray,
    forecast: np.ndarray,
    seasonal_error: float,
) -> float:
    r"""
    .. math::
        mase = mean(|Y - \hat{Y}|) / seasonal\_error
    See [HA21]_ for more details.
    """
    return np.mean(np.abs(target - forecast)) / seasonal_error