pub type PFN_vkGetRefreshCycleDurationGOOGLE = unsafe extern "system" fn(device: Device, swapchain: SwapchainKHR, p_display_timing_properties: *mut RefreshCycleDurationGOOGLE) -> Result;
pub type PFN_vkGetRefreshCycleDurationGOOGLE = unsafe extern "system" fn(device: Device, swapchain: SwapchainKHR, p_display_timing_properties: *mut RefreshCycleDurationGOOGLE) -> Result;