Function get_gui_manager

src/python/python_runtime.cpp:270–270

    void set_gui_manager(vis::gui::GuiManager* gm) { g_gui_manager.store(gm); }
    vis::gui::GuiManager* get_gui_manager() { return g_gui_manager.load(); }

    namespace {
        std::atomic<vis::gui::GlobalContextMenu*> g_global_context_menu{nullptr};