code: def test_2_list_table_columns(self):
      datasets = self.handler.get_columns("Rentals", "home_rentals")
      assert datasets.type is not RESPONSE_TYPE.ERROR
  
file_path: mindsdb/mindsdb/integrations/handlers/bigquery_handler/tests/test_bigquery_handler.py
imports: import unittest
  from mindsdb.integrations.handlers.bigquery_handler.bigquery_handler import BigQueryHandler
  from mindsdb.integrations.libs.response import RESPONSE_TYPE
label_desc: Use image node_id 4 for calling the BigQueryHandlerTest obj's underlying member method code with example usage: obj.test_2_list_table_columns() without return types