import type { App } from '@heroku/types/3.sdk';
import type { ResourceCtx } from '../../../core/extend-resource.js';
import type { ContainerOptions } from './index.js';
export declare class NotAContainerAppError extends Error {
    readonly app: App;
    readonly id = "not_a_container_app";
    constructor(app: App);
}
/**
 * Ensure that the given app is a container app.
 * @throws {NotAContainerAppError} if the app is not a container app
 */
export declare function ensureContainerStack(ctx: Pick<ResourceCtx, 'platform'>, appIdentity: string, options?: ContainerOptions): Promise<void>;