code: def from_json(
      cls: Type["Classes"],
      json_obj: dict,
      source_artifact: Optional["Artifact"],
  ) -> "Classes":
      return cls(json_obj.get("class_set"))
  
file_path: wandb/wandb/sdk/data_types/helper_types/classes.py
imports: import os
  from typing import TYPE_CHECKING, Any, Dict, Optional, Sequence, Type, Union
  from ..None import _dtypes
  from ..base_types.media import Media
label_desc: Use image node_id 2 for calling the Classes obj's underlying member method code with example usage: obj.from_json(cls, json_obj, source_artifact) and returns: cls