code: def test_3_get_tables(self):
      tbls = self.handler.get_tables()
      assert isinstance(tbls, list)
  
file_path: mindsdb/mindsdb/integrations/handlers/opengauss_handler/tests/test_opengauss_handler.py
imports: import unittest
  import pandas
  from mindsdb.integrations.handlers.opengauss_handler.opengauss_handler import OpenGaussHandler
label_desc: Use image node_id 5 for calling the OpenGaussHandlerTest obj's underlying member method code with example usage: obj.test_3_get_tables() without return types