How to copy blob to blob and get notification that it was done

Good day,
I'm using the azure-stroage-cpplite library in my project and stuck with the copy blob problem. In the cpplite version, we have only start_copy function that doesn't wait until data will be copied. We don't have any option to place a callback that will be called when copy operation was done. The only way that I found is to call the `get_property` function until `copy_status` has `pooling` status. In the full cpp library, we have the `wait_for_copy` method that does it the same way. But maybe you could suggest a more elegant and quick way to check that blob was copied successfully without get_prop, sleep, and other additional calls?