return null;
        }
        StrongKeyWeakValueEntry<K, V> newEntry = newEntry(segment, entry.key, entry.hash, newNext);
        newEntry.valueReference = entry.valueReference.copyFor(segment.queueForValues, newEntry);
        return newEntry;
      }

      @Override
      public void setValue(
          StrongKeyWeakValueSegment<K, V> segment, StrongKeyWeakValueEntry<K, V> entry, V value) {

  public static <V extends @Nullable Object> ListenableFuture<List<V>> allAsList(
      ListenableFuture<? extends V>... futures) {
    ListenableFuture<List<@Nullable V>> nullable =
        new ListFuture<V>(ImmutableList.copyOf(futures), true);
    // allAsList ensures that it fills the output list with V instances.
    @SuppressWarnings("nullness")
    ListenableFuture<List<V>> nonNull = nullable;
    return nonNull;
  }

  /**

      Collection<E> collection = (Collection<E>) elements;
      if (collection.isEmpty()) {
        return ImmutableSet.of();
      } else {
        return ImmutableEnumSet.asImmutable(EnumSet.copyOf(collection));
      }
    } else {
      Iterator<E> itr = elements.iterator();
      if (itr.hasNext()) {
        EnumSet<E> enumSet = EnumSet.of(itr.next());
        Iterators.addAll(enumSet, itr);

   */
  @SafeVarargs
  public static <T extends @Nullable Object> Iterator<T> concat(Iterator<? extends T>... inputs) {
    return concatNoDefensiveCopy(Arrays.copyOf(inputs, inputs.length));
  }

  /**
   * Combines multiple iterators into a single iterator. The returned iterator iterates across the

    }
  }

  // For Guava bug https://github.com/google/guava/issues/1025
  public void testDespiteGenericSignatureFormatError() {
    ImmutableSet<?> unused =
        ImmutableSet.copyOf(
            TypeToken.of(ToReproduceGenericSignatureFormatError.SubOuter.SubInner.class)
                .getTypes()
                .rawTypes());
  }

  private abstract static class Entry<K, V> {

    }
  }

  // For Guava bug https://github.com/google/guava/issues/1025
  public void testDespiteGenericSignatureFormatError() {
    ImmutableSet<?> unused =
        ImmutableSet.copyOf(
            TypeToken.of(ToReproduceGenericSignatureFormatError.SubOuter.SubInner.class)
                .getTypes()
                .rawTypes());
  }

  private abstract static class Entry<K, V> {