How to use the xskillscore.mse function in xskillscore

+-----------------+-----------+
        | **orientation** | negative  |
        +-----------------+-----------+

    See also:
        * xskillscore.mse

    Reference:
        * Ian T. Jolliffe and David B. Stephenson. Forecast Verification: A
          Practitioner’s Guide in Atmospheric Science. John Wiley & Sons, Ltd,
          Chichester, UK, December 2011. ISBN 978-1-119-96000-3 978-0-470-66071-3.
          URL: http://doi.wiley.com/10.1002/9781119960003.
    """
    weights = metric_kwargs.get('weights', None)
    skipna = metric_kwargs.get('skipna', False)
    return mse(forecast, verif, dim=dim, weights=weights, skipna=skipna)