docs: @Override
      public Exception getDiskCacheException() {
          final String methodName = "getDiskCacheException()";
          Exception ex = null;
          if (this.swapToDisk) {
              // TODO write code to support getDiskCacheException function
              if (tc.isDebugEnabled()) {
                  Tr.debug(tc, methodName + " cacheName=" + cacheName + " ERROR because it is not implemented yet");
              }
          } else {
              if (this.featureSupport.isDiskCacheSupported() == false) {
                  Tr.error(tc, "DYNA1064E", new Object[] { methodName, cacheName, this.cacheProviderName });
              } else {
                  if (tc.isDebugEnabled()) {
                      Tr.debug(tc, methodName + " cacheName=" + cacheName + " no operation is done because the disk cache offload is not enabled");
                  }
              }
          }
          return ex;
      }