import { SbbElement } from '../base-elements/element.ts';
import { AbstractConstructor } from './constructor.ts';
export declare class SbbRequiredMixinType {
    accessor required: boolean;
    protected isRequiredExternally(): boolean;
}
/**
 * Enhance your component with a required property.
 */
export declare const SbbRequiredMixin: <T extends AbstractConstructor<SbbElement>>(superClass: T) => AbstractConstructor<SbbRequiredMixinType> & T;
//# sourceMappingURL=required-mixin.d.ts.map