import type { ValueComparator } from '../value-comparators/value-comparator';
import type { ValueAccessor } from './value-accessor';
export type OnTouchedCallback = () => void;
export type OnChangeCallback<TValue> = (value: TValue | null) => void;
export declare abstract class ValueAccessorBase<TValue, TElement extends HTMLElement> implements ValueAccessor<TValue, TElement> {
    readonly kind: string;
    readonly valueComparator: ValueComparator<TValue>;
    readonly supportsMultipleElements: boolean;
    readonly supportsNativeValidation: boolean;
    private _onTouched;
    private _onChange;
    constructor(kind: string);
    abstract get elements(): ReadonlySet<TElement>;
    abstract detach(el: TElement): void;
    abstract readValue(): TValue | null;
    abstract writeValue(value: TValue): void;
    abstract setDisabledState(disabled: boolean): void;
    abstract focus(): void;
    abstract reset(): void;
    /**
     * @internal
     */
    _registerListeners(onTouched: OnTouchedCallback, onChange: OnChangeCallback<TValue>): void;
    attach(_el: TElement): void;
    waitForRenderComplete(_el: TElement): Promise<void>;
    isEmpty(value: TValue | null): boolean;
    checkValidity(): boolean;
    reportValidity(): void;
    setCustomValidity(_message: string): void;
    protected notifyChange(): void;
    protected notifyTouched(): void;
}