docs: public void enableServletCacheStats() {
          final String methodName = "enableServletCacheStats";
          try {
              if (null == _statsInstance) {
  
                  _iCacheType = TYPE_SERVLET;
  
                  if (tc.isDebugEnabled())
                      Tr.debug(tc, methodName + " Creating statistic for " + _sCacheName + " instance (servlet cache)");
                  _statsInstance = StatsFactory.createStatsInstance(WSDynamicCacheStats.SERVLET_CACHE_TYPE_PREFIX + _sCacheName, _cacheRootStatsGroup,
                          null, this);
                  if (_diskOffloadEnabled) {
                      if (_cacheDiskStatsGroup == null) {
                          if (tc.isDebugEnabled())
                              Tr.debug(tc, methodName + " Creating disk group" + " for cacheName=" + _sCacheName);
                          _cacheDiskStatsGroup = StatsFactory.createStatsGroup(WSDynamicCacheStats.DISK_GROUP, templateCount13, _statsInstance, null,
                                  this);
                      }
                      _csmDisk = new CacheStatsModule(_sCacheName, WSDynamicCacheStats.DISK_OFFLOAD_ENABLED, _cacheDiskStatsGroup, this);
                  }
              }
          } catch (StatsFactoryException e) {
              com.ibm.ws.ffdc.FFDCFilter.processException(e, "com.ibm.ws.cache.stat.CacheStatsModule", "198", this);
              if (tc.isDebugEnabled())
                  Tr.debug(tc, methodName + " Exception while enabling servlet cache stats template - cacheName=" + _sCacheName + ": "
                          + ExceptionUtility.getStackTrace(e));
          }
      }