text: 
  from typing import ClassVar
  from pydantic import BaseModel
  
  class Descriptor:
      def __get__(self, instance, owner):
          return owner
  
  class A(BaseModel):
      _abc: str = str('abc')
      __cde: str = str('abc')
      efg: ClassVar[str] = str('abc')
      class Config:
          keep_untouched = (Descriptor,)
  
      descriptor1 = Descriptor()
  
  class B(A):
      _efg: str = str('abc')
      __hij: str = str('abc')
      klm: ClassVar[str] = str('abc')
      class Config:
          keep_untouched = (Descriptor,)
  
      descriptor2 = Descriptor()
  A().<caret>