class_docstr: A wrapper for inspecting a JSON schema
class_docstr_tok: ["A","wrapper","for","inspecting","a","JSON","schema"]
code: def ref(self) -> Optional[str]:
      return self.raw_schema.get("$ref", None)
  
imports: import keyword
  import re
  import subprocess
  import textwrap
  import urllib
  from typing import Any, Dict, Final, Iterable, List, Optional, Union
  from .schemapi import _resolve_references
label_desc: Use image node_id 19 for calling the SchemaInfo obj's underlying member method code with example usage: obj.ref() and returns: self