pub type PFN_vkLayerCreateDevice = unsafe extern "system" fn(_instance: Instance, _physical_device: PhysicalDevice, _create_info: *const DeviceCreateInfo, _allocator: *const AllocationCallbacks, _device: *mut Device, _layer_gipa: PFN_vkGetInstanceProcAddr, _next_gdpa: *mut PFN_vkGetInstanceProcAddr) -> Result;