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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def register_view(self, view):
 """Called when the view was registered"""

        super(StateMachineTreeController, self).register_view(view)
        self.view.connect('button_press_event', self.mouse_click)
        self.view_is_registered = True
        self.update(with_expand=True)