import { ValueAccessorMultiple } from '../../../value-accessors/value-accessor-multiple';
export declare class RadioValueAccessor extends ValueAccessorMultiple<string, HTMLInputElement> {
    private readonly _group;
    constructor(group: string);
    attach(el: HTMLInputElement): void;
    detach(el: HTMLInputElement): void;
    readValue(): string | null;
    writeValue(value: string): void;
    setDisabledState(disabled: boolean): void;
    reset(): void;
    focus(): void;
    checkValidity(): boolean;
    reportValidity(): void;
    setCustomValidity(message: string): void;
}