RealtimeListeners: {
    close?: ((code: number, reason: string) => void);
    error?: ((error: Error) => void);
    open?: ((event: SessionBeginsEventData) => void);
    session_information?: ((info: SessionInformation) => void);
    transcript?: ((transcript: RealtimeTranscript) => void);
    transcript.final?: ((transcript: FinalTranscript) => void);
    transcript.partial?: ((transcript: PartialTranscript) => void);
}