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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 set_visible_func(self, visible_func):
 """Set the function to decide visibility of an item :param visible_func: A callable that returns a boolean result to decide if an item should be visible, for example:: def is_visible(item):
 return True """

        self.model_filter.set_visible_func(
                self._internal_visible_func,
                visible_func,
                )
        self._visible_func = visible_func
        self.model_filter.refilter()