import { ValueAccessorBase } from './value-accessor-base';
export declare abstract class ValueAccessorMultiple<TValue, TElement extends HTMLElement> extends ValueAccessorBase<TValue, TElement> {
    readonly supportsMultipleElements: boolean;
    protected readonly _elements: Set<TElement>;
    get elements(): ReadonlySet<TElement>;
    protected get firstElement(): TElement | null;
    attach(el: TElement): void;
    detach(el: TElement): void;
}