private void handlePhantomReference(Reference<?> ref) {
        // Find the resource holder by phantom reference
        for (ResourceHolder holder : activeResources.values()) {
            if (holder.phantomRef == ref) {
                if (!holder.closed) {
                    reportLeak(holder);
                }
                activeResources.remove(holder.resourceId);
                break;
            }
        }
    }

        ShellCommandRegistryHolder holder = new ShellCommandRegistryHolder();
        holder.addCommandRegistry(builtins);

        // gather commands
        Map<String, ShellCommandRegistryFactory> factories =
                context.lookup.lookupMap(ShellCommandRegistryFactory.class);
        for (Map.Entry<String, ShellCommandRegistryFactory> entry : factories.entrySet()) {

          try {
            // The cast is safe because tryAdvance puts a T into `holder`.
            action.accept(function.apply(uncheckedCastNullableTToT(holder), index++));
            return true;
          } finally {
            holder = null;
          }
        }
        return false;
      }

      @Override
      Splitr createSplit(Spliterator<T> from, long i) {

                      holder.count++;
                      return null;
                    }
                  },
                  directExecutor());
        }
      }
      settableFuture.set(null);
      completeLengthChecks = allAsList(lengthChecks).get();
    } finally {
      service.shutdown();
    }
    assertThat(holder.count).isEqualTo(ITERATION_COUNT);

        final SmbAuthenticationHolder holder = new SmbAuthenticationHolder();
        final SmbAuthentication[] smbAuthentications =
                getInitParameter(SMB_AUTHENTICATIONS_PROPERTY, new SmbAuthentication[0], SmbAuthentication[].class);
        if (smbAuthentications != null) {
            for (final SmbAuthentication smbAuthentication : smbAuthentications) {
                holder.add(smbAuthentication);
            }

                if (logger.isDebugEnabled()) {
                    logger.debug("Adding SmbAuthentication: {}", smbAuthentication);
                }
                holder.add(smbAuthentication);
            }
        }
        smbAuthenticationHolder = holder;
    }

    @Override
    public void close() throws Exception {
        smbAuthenticationHolder = null;
        if (cifsContext != null) {

          try {
            // The cast is safe because tryAdvance puts a T into `holder`.
            action.accept(function.apply(uncheckedCastNullableTToT(holder), index++));
            return true;
          } finally {
            holder = null;
          }
        }
        return false;
      }

      @Override
      Splitr createSplit(Spliterator<T> from, long i) {

    checkNotNull(updaterFunction);
    AtomicLong holder = new AtomicLong();
    map.compute(
        key,
        (K k, @Nullable Long value) -> {
          long oldValue = (value == null) ? 0L : value.longValue();
          holder.set(oldValue);
          return updaterFunction.applyAsLong(oldValue);
        });
    return holder.get();
  }

  /**

    ImmutableListMultimap.Builder<String, Integer> builder = new Builder<>();
    StringHolder holder = new StringHolder();
    holder.string = "one";
    Entry<String, Integer> entry =
        new AbstractMapEntry<String, Integer>() {
          @Override
          public String getKey() {
            return holder.string;
          }

          @Override
          public Integer getValue() {

        enterLocalPassiveMode = getInitParameter("enterLocalPassiveMode", false, Boolean.class);

        // Initialize FTP authentication holder
        final FtpAuthenticationHolder holder = new FtpAuthenticationHolder();
        final FtpAuthentication[] ftpAuthentications =
                getInitParameter(FTP_AUTHENTICATIONS_PROPERTY, new FtpAuthentication[0], FtpAuthentication[].class);