/**
 * Filters and returns the supported key system configuration for a given system string.
 *
 * @param keySystem - Key system string such as 'com.widevine.alpha'
 * @param configs - An array of key system configurations.
 * @returns The first supported configuration or null if none are supported.
 *
 * @group DRM
 * @beta
 */
export declare function getSupportedKeySystemConfiguration(keySystem: string, configs: Iterable<MediaKeySystemConfiguration>): {
    supportedAudio: MediaKeySystemMediaCapability[];
    supportedVideo: MediaKeySystemMediaCapability[];
};
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