declare namespace MusicKit {
    interface MusicKitConfiguration {
        /**
         * See https://js-cdn.music.apple.com/musickit/v3/docs/iframe.html?path=/story/get-started--page#configuring-musickit-on-the-web
         */
        'developerToken': string;

        /**
         * Your application configuration
         */
        'app': {
            /**
             * The name of your application
             */
            'name': string;

            /**
             * Build or version number of application
             */
            'build'?: string;

            /**
             * A URL to your application logo. Should be square at 152x152px
             */
            'icon'?: string;
        };

        'bitrate'?: PlaybackBitrate;

        /**
         * Set the storefront, which is set for the API requests.
         * If unset, then the authenticated user's storefrontId will be used.
         */
        'storefrontId'?: string;
    }

    function configure ( config: MusicKitConfiguration ): Promise<MusicKitInstance>;
}