Gog3DBox
GObject ├── GogObject │ ╰── Gog3DBox ╰── GogView ╰── Gog3DBoxView
#define GOG_3D_BOX_TYPE (gog_3d_box_get_type ())
typedef struct _Gog3DBox Gog3DBox;
typedef struct _Gog3DBoxView Gog3DBoxView;