Undo/Redo issues of QTextEdit

In the assistent entry for QTextEdit one can find:

Quote:

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plainText : QString
This property gets and sets the text edit's contents as plain text. Previous contents are removed and undo/redo history is reset when the property is set

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But what if I want to revert the action just after I have set text with setPlainText(str) ? It would be reasonable not to clear undo/redo history, since user may want to restore previous text after setPlainText was called. Is there a simple way to go around it?