@type t() ::
  %ExBifrost.Model.GeminiGenerationRequestGenerationConfigSpeechConfigMultiSpeakerVoiceConfigSpeakerVoiceConfigsInner{
    speaker: String.t() | nil,
    voiceConfig:
      ExBifrost.Model.GeminiGenerationRequestGenerationConfigSpeechConfigVoiceConfig.t()
      | nil
  }