import { NodeDefinition, NodeLike, StaticGraphNode, StaticNodeDefinition, StaticNodeType } from '../../types/graph';
import { EntriesNodeDefinition } from './entries';
import { FieldSetDefinition, FieldsNodeDefinition } from './fields';
import { WithTransformsNodeDefinition } from './with-transforms';
/**
 * An instance of the [[key]] node.
 * See the [[key]] documentation to find out more.
 */
export interface KeyNode extends StaticGraphNode<'key', KeyNodeProperties> {
}
/**
 * A definition of the [[key]] node.
 * See the [[key]] documentation to find out more.
 */
export interface KeyNodeDefinition extends StaticNodeDefinition<'key', KeyNodeProperties> {
}
export interface KeyNodeProperties {
    key: NodeDefinition;
    children?: FieldsNodeDefinition | EntriesNodeDefinition | WithTransformsNodeDefinition;
}
/**
 * The implementation of the [[key]] node.
 * See the [[key]] documentation to learn more.
 */
export declare const KeyNodeType: StaticNodeType<'key', KeyNodeProperties>;
/**
 * Creates a new instance of a [[key]] node, which is a type of a [[NodeDefinition]] used as part of a [[query]]
 * to declare what node should be retrieved from the graph. A key can contain children.
 * See the **Basic query** example from the [[query]] documentation to learn more.
 */
export declare function key(key: NodeDefinition | NodeLike, children?: EntriesNodeDefinition | FieldsNodeDefinition | FieldSetDefinition | WithTransformsNodeDefinition): KeyNodeDefinition;
export declare function isKeyNodeDefinition(value: NodeDefinition): value is KeyNodeDefinition;