import { Observable } from 'rxjs';
import { BzThemeConfig } from './theme.config';
export declare class BzThemeService {
    constructor(themeConfig?: BzThemeConfig);
    private theme;
    THEME_SESSION: string;
    /**
     * Listen for theme.
     *
     * @author Federico Gambardella<federico.gambardella@mice.it>
     */
    listenTheme(): Observable<string>;
    /**
     * Sets theme.
     *
     * @author Federico Gambardella<federico.gambardella@mice.it>
     * @param object
     */
    setTheme(value: string): void;
}