code: def test_0_check_connection(self):
      assert self.handler.check_connection()
  
file_path: mindsdb/mindsdb/integrations/handlers/vertica_handler/tests/test_vertica_handler.py
imports: import unittest
  from mindsdb.integrations.handlers.vertica_handler.vertica_handler import VerticaHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
label_desc: Use image node_id 2 for calling the VerticaHandlerTest obj's underlying member method code with example usage: obj.test_0_check_connection() without return types