def list_pages(self, space_id: str) -> List[Dict]:
        """Returns list of pages in a given space."""
        if space_id == "non_existent_space":
            return []
        return self.pages_data
Returns list of pages in a given space.
llama-index-integrations/readers/llama-index-readers-gitbook/tests/test_simple_gitbook_reader.py