pub type PFN_vkGetPhysicalDevicePresentRectanglesKHR = unsafe extern "system" fn(PhysicalDevice, SurfaceKHR, *mut u32, *mut Rect2D) -> Result;pub type PFN_vkGetPhysicalDevicePresentRectanglesKHR = unsafe extern "system" fn(PhysicalDevice, SurfaceKHR, *mut u32, *mut Rect2D) -> Result;