succ.predecessorInValueSet = pred;
      }
    }

    private void deleteFromValueSet(ValueEntry<K, V> entry) {
      succeedsInValueSet(entry.predecessorInValueSet, entry.successorInValueSet);
    }

    private void appendToValueSet(ValueEntry<K, V> newEntry) {
      succeedsInValueSet(lastEntry, newEntry);
      lastEntry = newEntry;
    }

    private int mask() {
      return hashTable.length - 1;
    }