Grc_gnuradio import blks2 replacement?

[George Edwards]

Porting an older version of some code that used an earlier version of
gnuradio libs, and am rebuilding with gnuradio 3.10.  Old code referred to
an import of blks2 from grc_gnuradio which then fails with No module named
grc_radio.  Is there a replacement for that module?