code: def _int_to_opt(i: int) -> Optional[int]:
      if i == -9223372036855:
          return None
      else:
          return i
  
file_path: upgini/src/upgini/utils/datetime_utils.py
imports: import datetime
  import logging
  import re
  from typing import List, Optional
  import numpy
  import pandas
  from dateutil.relativedelta import relativedelta
  from pandas.api.types import is_numeric_dtype, is_period_dtype, is_string_dtype
  from upgini.errors import ValidationError
label_desc: Use image node_id 2 for calling the DateTimeSearchKeyConverter obj's underlying member method code with example usage: obj._int_to_opt(i) and returns: None, i