CC3220SF: sl_socket(..) used for "carrier wave" test

I am looking at documentation of sl_socket(..) function and trying to understand the form used in CC3xxx_RadioTool_1.0.3.11_MOD.

I do not see documented that the last parameter can be WiFi channel in case the call is like this:

rawSocket = sl_Socket(SL_AF_RF, SL_SOCK_RAW, channel);

Do I miss something or is something missing in documentation?

Thanks for help in advance! Jiří