https://learn.microsoft.com/en-us/dotnet/api/microsoft.visualstudio.text.normalizedsnapshotspancollection?view=visualstudiosdk-2022
NormalizedSnapshotSpanCollection Class (Microsoft.VisualStudio.Text) | Microsoft Learn
A read-only collection of SnapshotSpan objects, all from the same snapshot.
classmicrosoftvisualstudiotextlearn