docstr: return a list of shard_refs or a part_ref
docstr_tok: ["return","a","list","of","shard_refs","or","a","part_ref"]
code: def get_partition_ref(self, partition_id):
      """
      return a list of shard_refs or a part_ref
      """
      part = self.partitions[partition_id]
      if isinstance(part, dict):
          partition = []
          for shard_idx in range(len(part)):
              shard = part[shard_idx]
              partition.append(shard)
          return partition
      else:
          return part
  
imports: from __future__ import annotations
  from collections import defaultdict
  import ray
  import ray._private.services
  import uuid
  import random
  from bigdl.orca.data import XShards
  from bigdl.orca.ray import OrcaRayContext
  import logging
  from bigdl.dllib.utils.log4Error import invalidInputError
  from numpy import ndarray
  from typing import TYPE_CHECKING, Any, Callable, DefaultDict, Dict, List, Tuple, Union, no_type_check
label_desc: Use image node_id 5 for calling the LocalStore obj's underlying member method code with example usage: obj.get_partition_ref(partition_id) and returns: partition, part