pub type PFN_vkCreateSwapchainKHR = unsafe extern "system" fn(_device: Device, _create_info: *const SwapchainCreateInfoKHR, _allocator: *const AllocationCallbacks, _swapchain: *mut SwapchainKHR) -> Result;pub type PFN_vkCreateSwapchainKHR = unsafe extern "system" fn(_device: Device, _create_info: *const SwapchainCreateInfoKHR, _allocator: *const AllocationCallbacks, _swapchain: *mut SwapchainKHR) -> Result;