pub type PFN_vkCreateDeferredOperationKHR = unsafe extern "system" fn(_device: Device, _allocator: *const AllocationCallbacks, _deferred_operation: *mut DeferredOperationKHR) -> Result;pub type PFN_vkCreateDeferredOperationKHR = unsafe extern "system" fn(_device: Device, _allocator: *const AllocationCallbacks, _deferred_operation: *mut DeferredOperationKHR) -> Result;