import * as i0 from "@angular/core";
/**
 * @internal
 */
export declare class SkyPageThemeAdapterService {
    #private;
    constructor(document: Document);
    /**
     * We can't use ViewEncapsulation.None for this behavior because Angular does
     * not remove `style` tags from the HEAD element after route changes.
     * @see https://github.com/angular/angular/issues/16670
     */
    addTheme(): void;
    removeTheme(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SkyPageThemeAdapterService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SkyPageThemeAdapterService>;
}