pub unsafe extern "C" fn gdk_window_begin_draw_frame(
window: *mut GdkWindow,
region: *const cairo_region_t,
) -> *mut GdkDrawingContext
pub unsafe extern "C" fn gdk_window_begin_draw_frame(
window: *mut GdkWindow,
region: *const cairo_region_t,
) -> *mut GdkDrawingContext