Generates a new instance of :class:`maspy.core.Si` from a decoded
        JSON object (as generated by :func:`maspy.core.Si._reprJSON()`).

        :param jsonobject: decoded JSON object

        :returns: a new instance of :class:`Si`

def _fromJSON(cls, jsonobject):
        """Generates a new instance of :class:`maspy.core.Si` from a decoded
        JSON object (as generated by :func:`maspy.core.Si._reprJSON()`).

        :param jsonobject: decoded JSON object

        :returns: a new instance of :class:`Si`
        """
        newInstance = cls(None, None)
        newInstance.__dict__.update(jsonobject)
        return newInstance