from adapter.c:1059
static const struct command_registration adapter_usb_command_handlers[] = {
#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
{
.name = "location",
.handler = &handle_usb_location_command,
.mode = COMMAND_CONFIG,
.help = "display or set the USB bus location of the USB device",
.usage = "[<bus>-port[.port]...]",
},
#endif
COMMAND_REGISTRATION_DONE
};