slave: SelectPaymentMethodSlave
GtkVBox(toplevel):
  GtkFrame(frame1, expand=True, fill=True):
    GtkHBox(methods_box):
      GtkRadioButton(padding=6): 'Money', active
      GtkRadioButton(padding=6): 'Bill'
      GtkRadioButton(padding=6): 'Card'
      GtkRadioButton(padding=6): 'Check'
      GtkRadioButton(padding=6): 'Credit ($ 0.00)', hidden, insensitive
      GtkRadioButton(padding=6): 'Deposit'
      GtkRadioButton(padding=6): 'Store Credit', hidden, insensitive
      GtkRadioButton(padding=6): 'Multiple'
    GtkLabel(): 'Payment method:'
