USB_AC_STATE_UNPLUMBED
case USB_AC_STATE_UNPLUMBED:
if (uacp->usb_ac_plumbing_state == USB_AC_STATE_UNPLUMBED) {
uacp->usb_ac_plumbing_state = USB_AC_STATE_UNPLUMBED;
uacp->usb_ac_plumbing_state = USB_AC_STATE_UNPLUMBED;
uacp->usb_ac_plumbing_state = USB_AC_STATE_UNPLUMBED;
ASSERT(uacp->usb_ac_plumbing_state == USB_AC_STATE_UNPLUMBED);