@type t() :: %Nvidia.Riva.Tts.SynthesizeSpeechResponseMetadata{
  __unknown_fields__: [
    {field_number :: integer(), Protobuf.Wire.Types.wire_type(),
     value :: term()}
  ],
  predicted_durations: [float() | :infinity | :negative_infinity | :nan],
  processed_text: String.t(),
  text: String.t()
}