code: def multiget(self, block_indices, keys):
      start = time.perf_counter()
      block = self.blocks[block_indices[0]]
      if len(set(block_indices)) == 1 and isinstance(
          self.blocks[block_indices[0]], pa.Table
      ):
          # Fast path: use np.searchsorted for vectorized search on a single block.
          # This is ~3x faster than the naive case.
          block = self.blocks[block_indices[0]]
          col = block[self.key_field]
          indices = np.searchsorted(col, keys)
          acc = BlockAccessor.for_block(block)
          result = [acc._get_row(i) for i in indices]
          # assert result == [self._get(i, k) for i, k in zip(block_indices, keys)]
      else:
          result = [
              self._get(i, k) for i, k in zip(block_indices, keys)
          ]
      self.total_time += time.perf_counter() - start
      self.num_accesses += 1
      return result
  
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 4 for calling the _RandomAccessWorker obj's underlying member method code with example usage: obj.multiget(block_indices, keys) and returns: result