code: def _is_search_key_by_name(self, column_name: str) -> bool:
      return str(column_name).lower() in ["email", "e_mail", "e-mail"]
  
file_path: upgini/src/upgini/utils/email_utils.py
imports: import logging
  import re
  from hashlib import sha256
  from typing import Dict, List, Optional
  import pandas
  from pandas.api.types import is_string_dtype
  from upgini.resource_bundle import bundle
  from upgini.metadata import SearchKey
  from upgini.utils.base_search_key_detector import BaseSearchKeyDetector
label_desc: Use image node_id 1 for calling the EmailSearchKeyDetector obj's underlying member method code with example usage: obj._is_search_key_by_name(column_name) and returns: unknown