/**
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import * as Schema from '../../api/schema';
import { Simple } from './simple';
import { Suggestion } from './suggestion';
import { Canvas } from './canvas';
import { Link } from './content/link';
import { Content } from './content/content';
import { Card } from './content/card';
import { Collection } from './content/collection';
import { CollectionBrowse } from './content/collectionBrowse';
import { Image } from './content/image';
import { List } from './content/list';
import { Media } from './content/media';
import { Table } from './content/table';
import { OrderUpdate } from './content/order';
/**
 * Prompts define how your Action renders responses to users and how your
 * Action prompts them to continue. As you build your Action, you can add
 * prompts to invocations and to various places within scenes. Prompts can be
 * as simple as a text or speech response, or can be more complex and contain
 * rich content like cards, images, and tables.
 *
 * @see {@link https://developers.google.com/assistant/conversational/prompts | Developer Documentation}
 * @see {@link https://github.com/actions-on-google/actions-builder-conversation-components-nodejs/ | Conversation Components code sample}
 */
export declare type PromptItem = string | Simple | Content | Card | Collection | CollectionBrowse | Canvas | Image | List | Media | Table | Link | Suggestion | OrderUpdate;
export declare class Prompt implements Schema.Prompt {
    content: Content | undefined;
    firstSimple: Simple | undefined;
    lastSimple: Simple | undefined;
    link: Link | undefined;
    suggestions: Suggestion[] | undefined;
    canvas: Canvas | undefined;
    orderUpdate: OrderUpdate | undefined;
    override: boolean | undefined;
    /** @hidden */
    constructor(input?: Schema.Prompt);
    append(item: string): this;
    add(...items: PromptItem[]): this;
}