message: Add some comments to cachegraphic
diff: @@ -17,6 +17,11 @@ public:
  void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override {}
  public slots:
  + /**
  + * @brief dataChanged
  + * The cache simulator indicates that some entries in the cache has changed. CacheGraphic will, using @p
  + * transaction, lazily initialize and update all required values to reflect the new state of the cache.
  + */
  void dataChanged(const CacheSim::CacheTransaction& transaction);
  /**
  @@ -66,6 +71,16 @@ private:
  };
  using CacheLine = std::map<unsigned, CacheWay>;
  +
  + /**
  + * @brief m_cacheTextItems
  + * All text items in the cache are managed in @var m_cacheTextItems.
  + * This object models the hierarchy of the cache, and stores all currently initialized text items for the cache.
  + * The object is indexed similarly to how the cache simulator is indexed. As such, a cache transaction is used to
  + * traverse the object.
  + * All items are lazily initialized in calls to dataChanged(). This prevents initializing a ton of items if a user
  + * has created a very large cache.
  + */
  std::map<unsigned, CacheLine> m_cacheTextItems;
  };
  