def get_prep_value(self, value):
        """Overrides ``models.Field`` method. This is used to convert
        the value from an instances of this class to bytes that can be
        inserted into the database.
        """
        if value is None:
            return None
        else:
            return encoding.smart_text(
                base64.b64encode(jsonpickle.encode(value).encode()))
Overrides ``models.Field`` method. This is used to convert
        the value from an instances of this class to bytes that can be
        inserted into the database.