import { NodeDefinition, StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../types/graph';
/**
 * An instance of the [[flow]] node.
 * See the [[flow]] documentation to find out more.
 */
export interface FlowNode extends StatelessGraphNode<'flow', FlowNodeProperties> {
}
/**
 * A definition of the [[flow]] node.
 * See the [[flow]] documentation to find out more.
 */
export interface FlowNodeDefinition extends StatelessNodeDefinition<'flow', FlowNodeProperties> {
}
export interface FlowNodeProperties {
    functions: Array<NodeDefinition>;
}
/**
 * The implementation of the [[flow]] node.
 * See the [[flow]] documentation for more information.
 */
export declare const FlowNodeType: StatelessNodeType<'flow', FlowNodeProperties>;
/**
 * Creates a new instance of the [[flow]] node, which works similarly to the `flow` function from
 * lodash, and can be used to chain node calls.
 *
 *
 * @example **Using the flow node**
 * ```javascript
 * import muster, { call, flow, format, fn, ref, setResult, variable } from '@dws/muster';
 *
 * const app = muster({
 *   createArticle: fn(() =>
 *     // The logic to create article goes here
 *     // And then return article id
 *     value('article-id')
 *   ),
 *   url: variable('/'),
 * });
 *
 * console.log('Get the URL');
 * app.resolve(ref('url')).subscribe((url) => console.log('URL:', url));
 *
 * console.log('Call flow node');
 * await app.resolve(call(flow(
 *   ref('createArticle'),
 *   fn((id) => setResult('url', format('/article/${id}', { id }))),
 * )));
 *
 * // Console output:
 * // Get the URL
 * // URL: /
 * // Call flow node
 * // URL: /article/article-id
 * ```
 */
export declare function flow(...functions: Array<NodeDefinition>): FlowNodeDefinition;
export declare function isFlowNodeDefinition(value: NodeDefinition): value is FlowNodeDefinition;