code: def sentry_dsn_can_be_blank(cls, v: str) -> Optional[str]:
      if v is None or len(v) == 0:
          return None
      return v
  
imports: import os
  import secrets
  from typing import Any
  from typing import Dict
  from typing import List
  from typing import Optional
  from typing import Union
  from pydantic import AnyHttpUrl
  from pydantic import BaseSettings
  from pydantic import EmailStr
  from pydantic import HttpUrl
  from pydantic import validator
label_desc: Use image node_id 2 for calling the Settings obj's underlying member method code with example usage: obj.sentry_dsn_can_be_blank(cls, v) and returns: v, None