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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 examine(self):
 """ Called by LiveReloadHandler's poll_tasks method. If a boolean true value is returned, then the waiters (browsers) are reloaded. """

        if self._changes:
            return self._changes.pop()

        action_file = None
        if self._changed:
            self._changed = False
            action_file = self._action_file or True  # TODO: Hack (see above)
        return action_file, None