import { Kernel } from '@jupyterlab/services';
/**
 * Restart a kernel after presenting a dialog.
 *
 * @param kernel - The kernel to restart.
 *
 * @param host - The optional host element for the dialog.
 *
 * @returns A promise that resolves to `true` the user elects to restart.
 *
 * #### Notes
 * This is a no-op if there is no kernel.
 */
export declare function restartKernel(kernel: Kernel.IKernel, host?: HTMLElement): Promise<boolean>;