https://doc.cuba-platform.com/manual-7.0/abstractWindow.html
At the first sentence: "AbstractWindow is a subclass of AbstractFrame ..."
From CUBA 7.0 and higher it isn't.
Also, methods
addBeforeCloseWithCloseButtonListener
addBeforeCloseWithShortcutListener
were removed
https://doc.cuba-platform.com/manual-7.0/abstractWindow.html At the first sentence: "AbstractWindow is a subclass of AbstractFrame ..." From CUBA 7.0 and higher it isn't. Also, methods addBeforeCloseWithCloseButtonListener addBeforeCloseWithShortcutListener were removed