How to calculate the number of operations in Undo/Redo stack?

How to calculate the number of operations in Undo/Redo stack?
I tried to override UndoManager.pushUndo method and increment "operationsCounter" there, but pushUndo is called each time I make a change in text.
Another idea was to override EditManager.finalizeDo and use "operationsCounter" there, but finalizeDo is private...
Do you have any idea?

Hi Richard,
Thanks for the reply. I suggested that existed the more simple way to implement this

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bye
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Message was edited by:
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