@type t() :: %Grpc.Reflection.V1.ServerReflectionResponse{
  __unknown_fields__: [
    {field_number :: integer(), Protobuf.Wire.Types.wire_type(),
     value :: term()}
  ],
  message_response:
    {:file_descriptor_response,
     Grpc.Reflection.V1.FileDescriptorResponse.t() | nil}
    | {:all_extension_numbers_response,
       Grpc.Reflection.V1.ExtensionNumberResponse.t() | nil}
    | {:list_services_response,
       Grpc.Reflection.V1.ListServiceResponse.t() | nil}
    | {:error_response, Grpc.Reflection.V1.ErrorResponse.t() | nil}
    | nil,
  original_request: Grpc.Reflection.V1.ServerReflectionRequest.t() | nil,
  valid_host: String.t()
}