import type { NormalizedShadow, Shadow } from 'modern-idoc';
import type { Element2D } from './Element2D';
import { CoreObject } from '../../../core';
export declare class Element2DShadow extends CoreObject implements NormalizedShadow {
    protected _parent: Element2D;
    enabled: boolean;
    color: NormalizedShadow['color'];
    blur: NormalizedShadow['blur'];
    offsetY: NormalizedShadow['offsetX'];
    offsetX: NormalizedShadow['offsetY'];
    constructor(_parent: Element2D);
    setProperties(properties?: Shadow): this;
    protected _updateProperty(key: string, value: any, oldValue: any): void;
    updateEffect(): void;
}