[Discuss-gnuradio] WBX and auto TR switching?

I'm assuming the WBX has auto TR switching?  Is there any code needed to enable auto TR switching from C++ after initializing the USRP2 with the standard usrp2::usrp2::make(interface, mac_addr_str); and then setting center frequency, decimation, interpolation, and gains?

Thanks for the help.

- George