code: def setUp(self) -> None:
      self.credentials_file = "test1_credentials.json"
      self.credentials_url = "s3://your-bucket/test_credentials.json"
      self.handler = GmailHandler(
          connection_data={
              "credentials_file": self.credentials_file,
              "credentials_url": self.credentials_url,
          }
      )
  
imports: from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
  from mindsdb.integrations.handlers.gmail_handler.gmail_handler import GmailHandler
  from mindsdb.integrations.handlers.gmail_handler.gmail_handler import EmailsTable
  from google.oauth2.credentials import Credentials
  from mindsdb_sql import parse_sql
  import unittest
  from unittest.mock import Mock, patch
  from unittest import mock
label_desc: Use image node_id 1 for calling the GmailHandlerTest obj's underlying member method code with example usage: obj.setUp() without return types