code: def test_4_get_tables(self):
      tbls = self.handler.get_tables()
      assert tbls.type is not RESPONSE_TYPE.ERROR
  
file_path: mindsdb/mindsdb/integrations/handlers/clickhouse_handler/tests/test_clickhouse_handler.py
imports: import unittest
  from mindsdb.integrations.handlers.clickhouse_handler.clickhouse_handler import ClickHouseHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
label_desc: Use image node_id 6 for calling the PostgresHandlerTest obj's underlying member method code with example usage: obj.test_4_get_tables() without return types