Possible to determine bar's "output" (current monitor) from a cffi module?

[justbuchanan]

First party modules have access to a Bar instance, which contains the name of the output the bar is being displayed on. For example, here it's used in the niri module:

Waybar/src/modules/niri/workspaces.cpp

Line 41 in 161367d

return ws["output"].asString() == bar_.output->name;

Is it possible to access the output name from a cffi module?