declare class TtsSubsystem {
    static identifier: string;
    audioElem: any;
    isMuted: boolean;
    sourceEvent: string | undefined;
    speak: (text: string, info: {
        displayOnly: boolean;
        shouldSkip: boolean;
    }, sourceEvent?: string) => Promise<unknown>;
    stopSpeaking: (resolutionFunc?: Function, rejectionFunc?: Function) => void;
    toggleMute: () => void;
}
declare const tts: TtsSubsystem;
export { tts };