@Override
      public UnmodifiableIterator<Entry<K, V>> iterator() {
        return asList().iterator();
      }

      @Override
      public Spliterator<Entry<K, V>> spliterator() {
        return asList().spliterator();
      }

      @Override
      public void forEach(Consumer<? super Entry<K, V>> action) {
        asList().forEach(action);
      }

      @Override

    }

    @Override
    public Iterator<E> iterator() {
      return delegate().iterator(); // manually synchronized
    }

    @Override
    public Spliterator<E> spliterator() {
      synchronized (mutex) {
        return delegate().spliterator();
      }
    }

    @Override
    public Stream<E> stream() {
      synchronized (mutex) {
        return delegate().stream();
      }
    }

              return backingEntry.getValue().size();
            }
          };
        }
      };
    }

    @Override
    public Spliterator<K> spliterator() {
      return CollectSpliterators.map(multimap.entries().spliterator(), 0, Map.Entry::getKey);
    }

    @Override
    public void forEach(Consumer<? super K> consumer) {
      checkNotNull(consumer);

        final Supplier<String> pathSupplier = () -> {
            final boolean parallel = false;
            return StreamSupport.stream(((Iterable<ActivationFrame>) stk::descendingIterator).spliterator(), parallel)
                    .map(f -> f.location)
                    .collect(Collectors.joining("."));
        };
        final Supplier<InputLocation> locationSupplier = () -> {

            final JsonNode root = objectMapper.readTree(cleanJson);
            final JsonNode node = root.get(key);
            if (node != null && node.isArray()) {
                return StreamSupport.stream(node.spliterator(), false)
                        .filter(JsonNode::isTextual)
                        .map(JsonNode::asText)
                        .filter(StringUtil::isNotBlank)