import { NodeDefinition, NodeLike, StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../types/graph';
/**
 * An instance of the [[lowerCase]] node.
 * See the [[lowerCase]] documentation to find out more.
 */
export interface LowerCaseNode extends StatelessGraphNode<'lower-case', LowerCaseNodeProperties> {
}
/**
 * A definition of the [[lowerCase]] node.
 * See the [[lowerCase]] documentation to find out more.
 */
export interface LowerCaseNodeDefinition extends StatelessNodeDefinition<'lower-case', LowerCaseNodeProperties> {
}
export interface LowerCaseNodeProperties {
    subject: NodeDefinition;
}
/**
 * The implementation of the [[lowerCase]] node.
 * See the [[lowerCase]] documentation to learn more.
 */
export declare const LowerCaseNodeType: StatelessNodeType<'lower-case', LowerCaseNodeProperties>;
/**
 * Creates a new instance of a [[lowerCase]] node, which is used when converting a string to a lower case string. The node expects
 * the subject to be a [[value]] that contains a string value. It works in a similar way to the
 * `String.toLowerCase` method in JavaScript.
 *
 *
 * @example **Convert string to lower case**
 * ```js
 * import muster, { lowerCase } from '@dws/muster';
 *
 * const app = muster({});
 *
 * await app.resolve(lowerCase('Hello World'));
 * // === 'hello world'
 * ```
 */
export declare function lowerCase(subject: NodeLike): LowerCaseNodeDefinition;
export declare function isLowerCaseNodeDefinition(value: NodeDefinition): value is LowerCaseNodeDefinition;