Checks if the operation is still running.
Returns true if the operation is still running. Otherwise, returns false.
Once the property returns false, GetAssetPackStateAsyncOperation.size and GetAssetPackStateAsyncOperation.states properties can be called to get results.
Read-only.
Additional resources: GetAssetPackStateAsyncOperation.isDone, GetAssetPackStateAsyncOperation.size, GetAssetPackStateAsyncOperation.states.