code: def _sample(
      self, n_samples: int, sort_key: "SortKey"
  ) -> "pandas.DataFrame":
      return self._table[sort_key.get_columns()].sample(
          n_samples, ignore_index=True
      )
  
imports: import collections
  import heapq
  from typing import TYPE_CHECKING, Any, Callable, Dict, Iterator, List, Optional, Tuple, TypeVar, Union
  import numpy
  from ray.air.constants import TENSOR_COLUMN_NAME
  from ray.data._internal.table_block import TableBlockAccessor, TableBlockBuilder
  from ray.data._internal.util import find_partitions
  from ray.data.block import Block, BlockAccessor, BlockExecStats, BlockMetadata, KeyType, U
  from ray.data.context import DataContext
  from ray.data.row import TableRow
label_desc: Use image node_id 18 for calling the PandasBlockAccessor obj's underlying member method code with example usage: obj._sample(n_samples, sort_key) and returns: self