def setup_slaves(self):
     register_payment_slaves()
     self.slave = MultipleMethodSlave(self, self, self.store,
                                      self.model, None, currency(0),
                                      finish_on_total=False)
     self.slave.enable_remove()
     self.attach_slave('place_holder', self.slave)

    def __init__(self, wizard, previous, store, model, method,
                 outstanding_value=None, finish_on_total=True):
        """
        :param wizard: the wizard this step is in
        :param previous: the previous step if there is any
        :param store: the store this step is executed
        :param model: the model of this step
        :param method: the payment method
        :param finish_on_total: if it is ``True`` automatically closes
           the wizard when payments total is equals to the total cost
           of the operation. When it is ``False``, waits for the user to
           click the finish button
        :param outstanding_value: if this value is not ``None``, it will
            be used as the total value of the payment
        """
        self._method_name = method
        self._method_slave = None
        self.model = model

        if outstanding_value is None:
            outstanding_value = currency(0)
        self._outstanding_value = outstanding_value
        self._finish_on_total = finish_on_total

        BaseWizardStep.__init__(self, store, wizard, previous)

        register_payment_slaves()
        self._create_ui()

 def setup_slaves(self):
     register_payment_slaves()
     outstanding_value = (self.model.total_amount_abs +
                          self.model.paid_total)
     self.slave = MultipleMethodSlave(self.wizard, self, self.store,
                                      self.model, None,
                                      outstanding_value=outstanding_value,
                                      finish_on_total=False,
                                      allow_remove_paid=False)
     self.slave.enable_remove()
     self.attach_slave('place_holder', self.slave)

 def __init__(self, store):
     register_payment_slaves()
     self.purchase_model = None
     first_step = ConsignmentSelectionStep(self, store)
     BaseWizard.__init__(self, store, first_step, None)
     self.next_button.set_sensitive(False)