import { NodeDefinition, NodeLike, StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../types/graph';
/**
 * An instance of the [[upperCase]] node.
 * See the [[upperCase]] documentation to find out more.
 */
export interface UpperCaseNode extends StatelessGraphNode<'upper-case', UpperCaseNodeProperties> {
}
/**
 * A definition of the [[upperCase]] node.
 * See the [[upperCase]] documentation to find out more.
 */
export interface UpperCaseNodeDefinition extends StatelessNodeDefinition<'upper-case', UpperCaseNodeProperties> {
}
export interface UpperCaseNodeProperties {
    subject: NodeDefinition;
}
/**
 * The implementation of the [[upperCase]] node.
 * See the [[upperCase]] documentation to learn more.
 */
export declare const UpperCaseNodeType: StatelessNodeType<'upper-case', UpperCaseNodeProperties>;
/**
 * Creates a new instance of a [[upperCase]] node, which is used when converting a string to an upper 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.toUpperCase` method in JavaScript.
 *
 *
 * @example **Convert string to upper case**
 * ```js
 * import muster, { upperCase } from '@dws/muster';
 *
 * const app = muster({});
 *
 * await app.resolve(upperCase('Hello World'));
 * // === 'HELLO WORLD'
 * ```
 */
export declare function upperCase(subject: NodeLike): UpperCaseNodeDefinition;
export declare function isUpperCaseNodeDefinition(value: NodeDefinition): value is UpperCaseNodeDefinition;