message: [crispy] LRUCache: Don't use try_get() but itemByKeyMapping.count to test for existence.
diff: @@ -50,7 +50,7 @@ class LRUCache
  void touch(Key _key) noexcept { (void) try_get(_key); }
  - [[nodiscard]] bool contains(Key _key) const noexcept { return try_get(_key) != nullptr; }
  + [[nodiscard]] bool contains(Key _key) const noexcept { return itemByKeyMapping_.count(_key) != 0; }
  [[nodiscard]] Value* try_get(Key _key) const { return const_cast<LRUCache*>(this)->try_get(_key); }
  