Function getMainViewport

src/OpenLoco/src/Ui/WindowManager.cpp:158–166

    }

    Viewport* getMainViewport()
    {
        auto mainWindow = getMainWindow();
        if (mainWindow != nullptr)
        {
            return mainWindow->viewports[0];
        }
        return nullptr;
    }

    template<typename TPred>
    static Window* findImpl(TPred pred)