Why TIsolationLevel was removed instead of deprecated

Hi,
why the com/softwareag/tamino/db/api/connection/TIsolationLevel Class was removed instead only marked as deprecated?
I’m using the implementation of tamino XML DB and it needs this class, and I must use the version 4.4
:shock: :shock: :shock: :shock:

In the “Future changes” document for version 4.2, it says:

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So there was warning about this change.