code: def _get(self, block_index, key):
      if block_index is None:
          return None
      block = self.blocks[block_index]
      column = block[self.key_field]
      if isinstance(block, pa.Table):
          column = _ArrowListWrapper(column)
      i = _binary_search_find(column, key)
      if i is None:
          return None
      acc = BlockAccessor.for_block(block)
      return acc._get_row(i)
  
imports: import bisect
  import logging
  import random
  import time
  from collections import defaultdict
  from typing import TYPE_CHECKING, Any, List, Optional
  import numpy
  import ray
  from ray.data._internal.remote_fn import cached_remote_fn
  from ray.data.block import BlockAccessor
  from ray.data.context import DataContext
  from ray.types import ObjectRef
  from ray.util.annotations import PublicAPI
label_desc: Use image node_id 7 for calling the _RandomAccessWorker obj's underlying member method code with example usage: obj._get(block_index, key) and returns: acc, None, None