Question Progressbars unintended behaviour

Hello there.
I'm trying to show my generating terrain progress with a cancelable progress bar using

Code (CSharp):

1. EditorUtility.DisplayCancelableProgressBar

so I expected something like:


but Unity's importing assets progress bar overrides my cancelable progress bar and I can't see my progress and cancel it:


Is there a way to hide "importing assets" progress bar or another way around to see my progress bar?

 

For anybody who have this problem I found the answer, Put:

AssetDatabase.StartAssetEditing();

before creating assets and call:

AssetDatabase.StopAssetEditing();

after finishing your work, for more information check this vidoe (from 29:00):