configured, so config_groups for particular functions are defined
in the functions implementation files drivers/usb/gadget/f_*.c.
-5. Funciton's code is written in such a way that it uses
+5. Function's code is written in such a way that it uses
usb_get_function_instance(), which, in turn, calls request_module.
So, provided that modprobe works, modules for particular functions