def __refund(self, subscription_charge_id, **kwargs):
        """Call documentation: `/subscription_charge/refund
        <https://www.wepay.com/developer/reference/subscription_charge#refund>`_,
        plus extra keyword parameters:

        :keyword str access_token: will be used instead of instance's
           ``access_token``, with ``batch_mode=True`` will set `authorization`
           param to it's value.

        :keyword bool batch_mode: turn on/off the batch_mode, see 
           :class:`wepay.api.WePay`

        :keyword str batch_reference_id: `reference_id` param for batch call,
           see :class:`wepay.api.WePay`

        :keyword str api_version: WePay API version, see
           :class:`wepay.api.WePay`

        """
        params = {
            'subscription_charge_id': subscription_charge_id
        }
        return self.make_call(self.__refund, params, kwargs)
Call documentation: `/subscription_charge/refund
        <https://www.wepay.com/developer/reference/subscription_charge#refund>`_,
        plus extra keyword parameters:

        :keyword str access_token: will be used instead of instance's
           ``access_token``, with ``batch_mode=True`` will set `authorization`
           param to it's value.

        :keyword bool batch_mode: turn on/off the batch_mode, see 
           :class:`wepay.api.WePay`

        :keyword str batch_reference_id: `reference_id` param for batch call,
           see :class:`wepay.api.WePay`

        :keyword str api_version: WePay API version, see
           :class:`wepay.api.WePay`