code: def _get_index_names(self):
      names = list(self._reader.header[0])
      idx_names = None
  
      if self._reader.leading_cols == 0 and self.index_col is not None:
          (idx_names, names, self.index_col) = self._clean_index_names(
              names, self.index_col
          )
  
      return names, idx_names
  
imports: from __future__ import annotations
  from collections import defaultdict
  from typing import TYPE_CHECKING, Hashable, Mapping, Sequence
  import warnings
  import numpy
  from pandas._libs import lib, parsers
  from pandas._typing import ArrayLike, DtypeArg, DtypeObj, ReadCsvBuffer
  from pandas.compat._optional import import_optional_dependency
  from pandas.errors import DtypeWarning
  from pandas.util._exceptions import find_stack_level
  from pandas.core.dtypes.common import is_categorical_dtype, pandas_dtype
  from pandas.core.dtypes.concat import concat_compat, union_categoricals
  from pandas.core.indexes.api import ensure_index_from_sequences
  from pandas.io.common import dedup_names, is_potential_multi_index
  from pandas.io.parsers.base_parser import ParserBase, ParserError, is_index_col
label_desc: Use image node_id 6 for calling the CParserWrapper obj's underlying member method code with example usage: obj._get_index_names() and returns: names,  idx_names