def METHOD_NAME(self):
    """
    Closes the driver for the stated device index.
    """
    _ = self.channel._
    self.driver_value = None
    self.state("STATE_USB_SET_DISCONNECTING")
    self.channel(_("Attempting disconnection from USB."))
    if self.driver_value == -1:
        self.channel(_("USB connection did not exist."))
        raise ConnectionError
    # self.driver.CH341CloseDevice(self.driver_index)
    self.state("STATE_USB_DISCONNECTED")
    self.channel(_("USB Disconnection Successful.\n"))