docs: public synchronized void registerSessionManager(Object key, IGenericSessionManager sessionMgr) {
          if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled() && LoggingUtil.SESSION_LOGGER_CORE.isLoggable(Level.FINE)) {
              LoggingUtil.SESSION_LOGGER_CORE.entering(methodClassName, methodNames[REGISTER_SESSION_MANAGER], "registryKey= " + key + " sessionMgr:" + sessionMgr);
          }
          _genericSessionManagers.put(key, sessionMgr);
          if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled() && LoggingUtil.SESSION_LOGGER_CORE.isLoggable(Level.FINE)) {
              LoggingUtil.SESSION_LOGGER_CORE.exiting(methodClassName, methodNames[REGISTER_SESSION_MANAGER]);
          }
      }