import { NodeDefinition, NodeLike, StaticGraphNode, StaticNodeDefinition, StaticNodeType } from '../../types/graph';
/**
 * An instance of the [[when]] node.
 * See the [[when]] documentation to find out more.
 */
export interface WhenNode extends StaticGraphNode<'when', WhenNodeProperties> {
}
/**
 * A definition of the [[when]] node.
 * See the [[when]] documentation to find out more.
 */
export interface WhenNodeDefinition extends StaticNodeDefinition<'when', WhenNodeProperties> {
}
export interface WhenNodeProperties {
    pattern: NodeDefinition;
    value: NodeDefinition;
}
/**
 * The implementation of the [[when]] node.
 * See the [[when]] documentation to learn more.
 */
export declare const WhenNodeType: StaticNodeType<'when', WhenNodeProperties>;
/**
 * Creates a new instance of a [[when]] node, which is used when defining a [[switchOn]] and
 * [[choose]] nodes. See the [[switchOn]] and [[choose]] documentation for examples of use.
 */
export declare function when(pattern: NodeDefinition | NodeLike, value: NodeDefinition | NodeLike): WhenNodeDefinition;
export declare function isWhenNodeDefinition(value: NodeDefinition): value is WhenNodeDefinition;