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

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()