import { NodeDefinition, NodeLike, StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../types/graph';
/**
 * An instance of the [[truncate]] node.
 * See the [[truncate]] documentation to find out more.
 */
export interface TruncateNode extends StatelessGraphNode<'truncate', TruncateNodeProperties> {
}
/**
 * A definition of the [[truncate]] node.
 * See the [[truncate]] documentation to find out more.
 */
export interface TruncateNodeDefinition extends StatelessNodeDefinition<'truncate', TruncateNodeProperties> {
}
export interface TruncateNodeProperties {
    length: NodeDefinition;
    omission: NodeDefinition | undefined;
    subject: NodeDefinition;
}
/**
 * The implementation of the [[truncate]] node.
 * See the [[truncate]] documentation to learn more.
 */
export declare const TruncateNodeType: StatelessNodeType<'truncate', TruncateNodeProperties>;
/**
 * Creates a new instance of a [[truncate]] node, which is used for truncating a string to a given length. The node expects
 * the subject to be a [[value]] containing a string value. It works in the same way as
 * `truncate` from `lodash`. By default, the omission is configured to `...` but it can be changed.
 *
 *
 * @example **Truncate a string**
 * ```js
 * import muster, { truncate } from '@dws/muster';
 *
 * const app = muster({});
 *
 * await app.resolve(truncate('Hello world', 5));
 * // === 'He...'
 *
 * await app.resolve(truncate('Hello world', 8));
 * // === 'Hello...'
 *
 * await app.resolve(truncate('Hello world', 6, '+'));
 * // === 'Hello+'
 *
 * await app.resolve(truncate('Hello world', 8, '+'));
 * // === 'Hello w+'
 * ```
 */
export declare function truncate(subject: NodeLike, length: NodeLike, omission?: NodeLike): TruncateNodeDefinition;
export declare function isTruncateNodeDefinition(value: NodeDefinition): value is TruncateNodeDefinition;