public SelfT session(String sessionId, Integer timeout) {
        return session(sessionId, null, timeout);
    }
Sets current session. Same as {@code session(sessionId, null, timeout)}.

@param sessionId session id, null means no session
@param timeout   timeout in seconds
@return the request itself
clickhouse-client/src/main/java/com/clickhouse/client/ClickHouseRequest.java