UHD function to determine USB version?

Hello,

I apologize if I missed it in the documentation, but is there a UHD
function that will return the USB version (e.g. USB 2 or USB 3) that the
USRP is using?

I'm using a B200 in a custom C++ program and would like to
programmatically verify the USB connection speed before attempting high
rate sampling.


Thanks!