import { RadioButtonComponent } from '../controls/radio-button.components';
import * as i0 from "@angular/core";
export declare class RadioButtonService {
    groups: {};
    constructor();
    addButton(button: RadioButtonComponent): void;
    removeButton(button: RadioButtonComponent): void;
    check(button: RadioButtonComponent): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<RadioButtonService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<RadioButtonService>;
}