code: def test_7_disconnect(self):
      assert self.handler.disconnect()
  
file_path: mindsdb/mindsdb/integrations/handlers/ingres_handler/tests/test_ingres_handler.py
imports: import unittest
  from mindsdb.integrations.handlers.ingres_handler.ingres_handler import IngresHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
label_desc: Use image node_id 9 for calling the IngresHandlerTest obj's underlying member method code with example usage: obj.test_7_disconnect() without return types