Build-in class to serialize a dataset to XML?

In 8.0.10, client tag import/export still use the old xml format...

but from the designer/client scope:

from com.inductiveautomation.ignition.common.sqltags.importexport.TagXMLImporter import TagXMLReader

return

Traceback (most recent call last):
  File "<input>", line 1, in <module>
ImportError: cannot import name TagXMLReader