feature request:fetch and set ionice

util-linux has ionice which sets the kernel IO scheduling process.
This in turn has 3 subclasses ( realtime, best-effort, idle ) and for the first two, an optional argument from 0 to 7.
It'd be nice if qps would be able to view/set a process IO policies without having to resort to the command line hunting for the pid.
see man ionice(1) and man ioprio_set(2) and man ioprio_get(2)