Method isValid

app/src/UI/WindowManager.cpp:52–52

* @brief Whether the key references a real widget. */

   * @brief Whether the key references a real widget.
   */
  [[nodiscard]] bool isValid() const { return widgetType >= 0 && relativeIndex >= 0; }

  /**
   * @brief Value equality on the (widgetType, relativeIndex) pair.