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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 fire(self, event):
 """ Fires a specified DOM event on the current node. :param event: the name of the event to fire (e.g., 'click'). Returns the :class:`zombie.dom.DOMNode` to allow function chaining. """

        self.browser.fire(self.element, event)
        return self