import { NodeDefinition, NodeLike, StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../../types/graph';
/**
 * An instance of the [[nthItem]] node.
 * See the [[nthItem]] documentation to find out more.
 */
export interface NthItemNode extends StatelessGraphNode<'nthItem', NthItemNodeProperties> {
}
/**
 * A definition of the [[nthItem]] node.
 * See the [[nthItem]] documentation to find out more.
 */
export interface NthItemNodeDefinition extends StatelessNodeDefinition<'nthItem', NthItemNodeProperties> {
}
export interface NthItemNodeProperties {
    index: NodeDefinition;
}
/**
 * The implementation of the [[nthItem]] node.
 * See the [[nthItem]] documentation to learn more.
 */
export declare const NthItemNodeType: StatelessNodeType<'nthItem', NthItemNodeProperties>;
/**
 * Creates a new instance of a [[nthItem]] node, which is a type of collection transform used to take a specific item out of a collection.
 * The items are zero-index based so in order to take the first item you have to call `nthItem(0)`,
 * second item is `nthItem(1)` and so on.
 * As with most nodes, a value will be implicitly mapped to a value node if it isn't
 * a [[NodeDefinition]] already. This means the index can be a reference to another node in the graph.
 * It also comes with a shorthand version to be used in the [ref](_utils_ref_.html#ref). See the **References to
 * items in collections** example from the [ref](_utils_ref_.html#ref) documentation.
 *
 *
 * @example **Take third item (using transform)**
 * ```js
 * import muster, { entries, query, ref, nthItem, withTransforms } from '@dws/muster';
 *
 * const app = muster({
 *   numbers: [1, 2, 3, 4, 5],
 * });
 *
 * const thirdItem = await app.resolve(query(ref('numbers'), withTransforms([
 *   nthItem(2),
 * ], entries())));
 * // thirdItem === [3]
 * ```
 * This example shows how to use a [[nthItem]] transform to take the third item out of a
 * collection.
 */
export declare function nthItem(index: NodeDefinition | NodeLike): NthItemNodeDefinition;