ws_log_format only for open and close connection operations

[cello86]

Hi All,
is it possible to configure the moduel to avoid the logging of all operations into ws_log_format like:

        ws_log /usr/local/nginx/logs/websocket.log;
        ws_log_format open "[open] $remote_addr $time_local $request";
        ws_log_format close "[close] $remote_addr $time_local $request $ws_conn_age";

?

Thanks,
Marcello