/**
 * @license Copyright © HatioLab Inc. All rights reserved.
 */
import { LitElement } from 'lit';
export declare class AbstractProperty extends LitElement {
    firstUpdated(): void;
    protected onValueChange(e: Event): void;
    protected getValueFromEventTarget(element: HTMLElement): any;
    protected onAfterValueChange(key: string, value: any): void;
}