# unions-tagged msgspec.Struct
  > GET https://api.example.com/pets
    [host: api.example.com, accept-encoding: gzip, deflate, accept: application/json] b''
  cat = Cat(lives=9)
  > GET https://api.example.com/pets
    [host: api.example.com, accept-encoding: gzip, deflate, accept: application/json] b''
  dog = Dog(good=True)
