import { IDesignItem } from '../../../../item/IDesignItem.js';
import { IDesignerCanvas } from '../../IDesignerCanvas.js';
import { BasicStackedToolbarExtension } from "../BasicStackedToolbarExtension.js";
import { IExtensionManager } from "../IExtensionManger.js";
export declare class BlockToolbarExtension extends BasicStackedToolbarExtension {
    protected static template: HTMLTemplateElement;
    constructor(extensionManager: IExtensionManager, designerView: IDesignerCanvas, extendedItem: IDesignItem);
    extend(cache: Record<string | symbol, any>, event: MouseEvent): void;
}
