gr-osmosdr bias-tx runtime switching feature request

Hello everyone, I would like to know if it's possible to switch the bias-tee / phantom power to the hackrf one at runtime in the osmocom-sink block. At the moment it's possible to change the gains and switch the 14 db amp at runtime. Only the bias-tee is en/disabled with device arguments "hackrf=0,bias-tx=0|1" which must be set at startup. Would like to be able to switch this when the flowgraph is running. I haven't figured out how to change device arguments after startup. Or would this require a change on the sink block adding something like a bias-tee option? Thanks and best wishes for the new year. Paul