docs: public synchronized IGenericSessionManager getSessionManager(Object registryKey) {
          if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled() && LoggingUtil.SESSION_LOGGER_CORE.isLoggable(Level.FINE)) {
              LoggingUtil.SESSION_LOGGER_CORE.entering(methodClassName, methodNames[GET_SESSION_MANAGER], "registryKey= " + registryKey);
          }
          IGenericSessionManager sessionManager = (IGenericSessionManager) _genericSessionManagers.get(registryKey);
          if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled() && LoggingUtil.SESSION_LOGGER_CORE.isLoggable(Level.FINE)) {
              LoggingUtil.SESSION_LOGGER_CORE.exiting(methodClassName, methodNames[GET_SESSION_MANAGER], "sessionManager= " + sessionManager);
          }
          return sessionManager;
      }