private VkObjectResult <IVkInstance> CreateInstanceInternal(IntPtr data, VkInstanceCreateInfo createInfo, VkAllocationCallbacks allocator)
{
var unmanaged = (byte *)data;
var pCreateInfo = createInfo.MarshalIndirect(ref unmanaged);
var pAllocator = allocator.MarshalIndirect(ref unmanaged);
VkInstance.HandleType handle;
var result = Direct.CreateInstance(pCreateInfo, pAllocator, &handle);
var instance = result == VkResult.Success ? new VkInstance(handle, allocator) : null;
return(new VkObjectResult <IVkInstance>(result, instance));
}