code: def url(self) -> Optional[str]:
      return self.uri
  
file_path: wandb/wandb/sdk/launch/git_reference.py
imports: import re
  from dataclasses import dataclass
  from enum import IntEnum
  from typing import Optional, Tuple, Union
  from wandb.sdk.launch.errors import LaunchError
label_desc: Use image node_id 2 for calling the GitReference obj's underlying member method code with example usage: obj.url() and returns: self