pub type PFN_vkDestroySwapchainKHR = unsafe extern "system" fn(device: Device, swapchain: SwapchainKHR, p_allocator: *const AllocationCallbacks);
pub type PFN_vkDestroySwapchainKHR = unsafe extern "system" fn(device: Device, swapchain: SwapchainKHR, p_allocator: *const AllocationCallbacks);