@Override
    public void setTraceLevel(int traceLevel) {
        session.setTraceLevel(traceLevel);
    }
Perform a synchronous sending of a message. This method block until the message is successfuly sent and a
corresponding reply has been received.

@param msg The message to send.
@return The reply received.
documentapi/src/main/java/com/yahoo/documentapi/messagebus/MessageBusSyncSession.java