code: def test_presto_get_simple_row_column(self):
      presto_column = ("column_name", "row(nested_obj double)", "")
      expected_results = [
          ("column_name", "ROW"),
          ("column_name.nested_obj", "FLOAT"),
      ]
      self.verify_presto_column(presto_column, expected_results)
  
imports: from collections import namedtuple
  from textwrap import dedent
  from unittest import mock, skipUnless
  import pandas
  from flask.ctx import AppContext
  from sqlalchemy import types
  from sqlalchemy.sql import select
  from superset.db_engine_specs.presto import PrestoEngineSpec
  from superset.errors import ErrorLevel, SupersetError, SupersetErrorType
  from superset.sql_parse import ParsedQuery
  from superset.utils.database import get_example_database
  from tests.integration_tests.db_engine_specs.base_tests import TestDbEngineSpec
label_desc: Use image node_id 6 for calling the TestPrestoDbEngineSpec obj's underlying member method code with example usage: obj.test_presto_get_simple_row_column() without return types