import { ToggleButton, ToggleButtonConfig } from './ToggleButton';
import { UIInstanceManager } from '../../UIManager';
import type { PlayerAPI } from 'bitmovin-player';
/**
 * A button that toggles the display of captions and subtitles.
 *
 * The button is hidden while the source provides no caption tracks, because there is nothing to
 * toggle in that case.
 *
 * When captions are switched on, the button restores the track that was enabled last. If no track
 * has been enabled yet, it prefers a track matching the current audio language and falls back to
 * the first available track.
 *
 * @category Buttons
 */
export declare class CaptionToggleButton extends ToggleButton<ToggleButtonConfig> {
    constructor(config?: ToggleButtonConfig);
    configure(player: PlayerAPI, uimanager: UIInstanceManager): void;
}