import { LitElement } from 'lit';
export declare const autoAttachToParent: unique symbol;
export declare const handleControlChange: unique symbol;
export declare class AttachableInterface {
    $control: HTMLElement | null;
    htmlFor: string | null;
    attach(control: HTMLElement, force?: boolean): void;
    detach(): void;
    [autoAttachToParent]: boolean;
    [handleControlChange](prev: HTMLElement | null, next: HTMLElement | null): void;
}
export declare const Attachable: <T extends Constructor<LitElement>>(superClass: T) => Constructor<AttachableInterface> & T;