code: def inner_list_join(cls, values):
      if isinstance(values, str):
          return values
      return ", ".join(sorted([str(v).strip() for v in values]))
  
imports: from enum import Enum
  from typing import List, Dict
  from dataclasses import dataclass, field
  from collections.abc import Iterable
  from parlai.utils.misc import warn_once
label_desc: Use image node_id 2 for calling the SerializationHelpers obj's underlying member method code with example usage: obj.inner_list_join(cls, values) and returns: str, values