if context does not have an attached frame clock.
StyleContext.getFrameClock
gdk.frame_clock.FrameClock getFrameClock()Returns the #GdkFrameClock to which context is attached.
Returns
a #GdkFrameClock, or null
gdk.frame_clock.FrameClock getFrameClock()Returns the #GdkFrameClock to which context is attached.
if context does not have an attached frame clock.