docs: public void longForEach(final LongLongConsumer consumer) {
          final long[] entries = this.entries;
          for (int i = 0; i < entries.length; i += 2) {
              final long key = entries[i];
              if (key != missingValue) {
                  consumer.accept(entries[i], entries[i + 1]);
              }
          }
      }