import { TsWindowService } from '@terminus/ngx-tools/browser';
export declare class TsDropProtectionService {
    private windowService;
    private hasProtection;
    constructor(windowService: TsWindowService);
    /**
     * Add drop protection
     */
    add(): void;
    /**
     * Remove drop protection
     */
    remove(): void;
    /**
     * Prevent default
     *
     * NOTE: In order to remove an event listener we need a reference to a method that does not change.
     *
     * @param e - The event
     */
    prevent(e: Event): void;
}