(glib:define-gboxed-opaque frame-timings "GdkFrameTimings"
  :export t
  :type-initializer "gdk_frame_timings_get_type"
  :alloc (error "GdkFrameTimings cannot be created from the Lisp side."))  

The gdk:frame-timings structure holds timing information for a single frame of the application’s displays. To retrieve a gdk:frame-timings instance, use the gdk:frame-clock-timings or gdk:frame-clock-current-timings functions. The information in the gdk:frame-timings instance is useful for precise synchronization of video with the event or audio streams, and for measuring quality metrics for the display of the application, such as latency and jitter.