pub type PFN_vkGetPastPresentationTimingGOOGLE = unsafe extern "system" fn(device: Device, swapchain: SwapchainKHR, p_presentation_timing_count: *mut u32, p_presentation_timings: *mut PastPresentationTimingGOOGLE) -> Result;
pub type PFN_vkGetPastPresentationTimingGOOGLE = unsafe extern "system" fn(device: Device, swapchain: SwapchainKHR, p_presentation_timing_count: *mut u32, p_presentation_timings: *mut PastPresentationTimingGOOGLE) -> Result;