code: public String getRequestedSessionIdFromURL(ServletRequest request) {
          if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled() && LoggingUtil.SESSION_LOGGER_CORE.isLoggable(Level.FINE)) {
              LoggingUtil.SESSION_LOGGER_CORE.entering(methodClassName, methodNames[GET_REQUESTED_SESSION_ID_FROM_URL]);
          }
          String sessionID = null;
          // LIBERTY Cannot reach IExtendedRequest from here anymore
          // overridden in SessionAffinityManagerImpl
          return null;
      }
docs: Requested session id from URL