import { type ReactNode } from 'react';
import { DataTestId } from '../../core/types/data-props.js';
import { StylingProps } from '../../core/types/styling-props.js';
/**
 * Accepted properties for the TitleBar Subtitle
 * @public
 */
export interface TitleBarSubtitleProps extends StylingProps, DataTestId {
    /** Elements to be displayed in the TitleBar Subtitle slot. */
    children: ReactNode;
}
/**
 * TitleBar Subtitle component
 * @public
 */
export declare const Subtitle: (props: TitleBarSubtitleProps & import("react").RefAttributes<HTMLDivElement>) => import("react").ReactElement | null;