class_docstr: TypeGuards for layout.Doc objects
code: def Class(el: DocMemberType) -> TypeGuard[layout.DocClass]:
      return el.obj.is_class
  
imports: from __future__ import annotations
  from dataclasses import dataclass, field
  from typing import TypeGuard, TypeVar
  from griffe import dataclasses
  from griffe import expressions
  from quartodoc import layout
  from quartodoc.pandoc.inlines import Link
  from .typing import DocMemberType, DocType
label_desc: Use image node_id 2 for calling the isDoc obj's underlying member method code with example usage: obj.Class(el) and returns: el