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Generally, subclasses of this class provide functions to allow data to be stored and retrieved, and instances are attached to blocks of text using
setUserData() . This makes it possible to store additional data per text block in a way that can be retrieved safely by the application.
Each subclass should provide a reimplementation of the destructor to ensure that any private data is automatically cleaned up when user data objects are deleted.
- class PySide6.QtGui.QTextBlockUserData#