code: def test_empty(self):
      def without_doc():
          pass
  
      parsed = parse_docstring(without_doc)
  
      assert parsed["raw"] is None
      assert parsed["summary"] is None
      assert parsed["details"] is None
      assert parsed["returns"] is None
      assert parsed["raises"] == {}
      assert parsed["params"] == []
  
imports: from __future__ import unicode_literals
  from flask_restplus.swagger import extract_path, extract_path_params, parse_docstring
label_desc: Use image node_id 1 for calling the ParseDocstringTest obj's underlying member method code with example usage: obj.test_empty() without return types