message: Add documentation for Unlink.
diff: @@ -397,9 +397,16 @@ protected:
  @param[in] id The index of the item in the BlockArray<T>.
  @param[in] item The item to insert at the begining of the linked list.
  - @warning The method is unsage and does not check if the bin has space.
  + @warning The method is unsafe and does not check if the bin has space.
  Be sure to use CheckRehash() to insert safely. */
  inline void Insert(int idx, int id, T &item);
  + /** @brief Unlink an item by providing its index @a id and the hash key
  + @a idx.
  +
  + @param[in] idx The hash key that identifies a bin/bucket.
  + @param[in] id The index of the item in the BlockArray<T>.
  +
  + @warning The method aborts if the item is not found. */
  void Unlink(int idx, int id);
  /** @brief Check table load factor and resize if necessary (load factor > 2).
  