code: def get_client(prefix: str) -> "KVClient":
      """Returns a KV-client (convenience wrapper around underlying filesystem).
  
      Args:
          prefix: Path prefix (e.g., "foo", "foo/bar") that defines the sub-directory
              data will be stored under. All writes will be scoped to this sub-dir.
  
      Examples:
          .. testcode::
  
              import ray
              from ray._private import storage
  
              ray.shutdown()
  
              ray.init(storage="/tmp/storage/cluster_1/storage")
              client = storage.get_client("foo")
              client.put("foo", b"bar")
  
      Returns:
          KVClient.
      """
      if not prefix:
          raise ValueError("A directory prefix must be specified.")
      fs, base_prefix = get_filesystem()
      combined_prefix = os.path.join(base_prefix, prefix)
      return KVClient(fs, combined_prefix)
  
imports: import os
  import re
  import urllib
  from pathlib import Path
  from typing import TYPE_CHECKING, List, Optional
  from ray._private.client_mode_hook import client_mode_hook
  from ray._private.utils import _add_creatable_buckets_param_if_s3_uri, load_class
  from ray._private.auto_init_hook import wrap_auto_init
label_desc: Use image node_id 2 for calling a global function with example usage: get_client(prefix) and returns: KVClient