(GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_VIDEO_OVERLAY_RECTANGLE))
typedef struct _GstVideoOverlayRectangle GstVideoOverlayRectangle;
-typedef struct _GstVideoOverlayRectangleClass GstVideoOverlayRectangleClass;
/**
* gst_video_overlay_rectangle_ref:
(GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_VIDEO_OVERLAY_COMPOSITION))
typedef struct _GstVideoOverlayComposition GstVideoOverlayComposition;
-typedef struct _GstVideoOverlayCompositionClass GstVideoOverlayCompositionClass;
/**
* gst_video_overlay_composition_ref: