Sometimes it's not obvious which USS should be exported so we need to refer the UXML. It's nice to have additional function to export UXML by utilizing Unity.UI.Builder.VisualTreeAssetToUXML.GenerateUXML(...).
https://github.com/Unity-Technologies/UnityCsReference/blob/72356cebf0cfb3551921bc07206d6b9d6508bb60/Modules/UIBuilder/Editor/Utilities/VisualTreeAssetExtensions/VisualTreeAssetToUXML.cs#L568
Sometimes it's not obvious which USS should be exported so we need to refer the UXML. It's nice to have additional function to export UXML by utilizing
Unity.UI.Builder.VisualTreeAssetToUXML.GenerateUXML(...).https://github.com/Unity-Technologies/UnityCsReference/blob/72356cebf0cfb3551921bc07206d6b9d6508bb60/Modules/UIBuilder/Editor/Utilities/VisualTreeAssetExtensions/VisualTreeAssetToUXML.cs#L568