import { GraphNode, GraphOperation, NodeDefinition, StatelessNodeType } from '../../types/graph';
import { OperationPathPart, QueryBuilder } from '../remote/utils/query-builder';
export interface ItemOperationResult {
    node: NodeDefinition;
    pathPart: OperationPathPart<GraphOperation>;
}
/**
 * An instance of the [[itemPlaceholder]] node.
 * See the [[itemPlaceholder]] documentation to find out more.
 */
export interface ItemPlaceholderNode extends GraphNode<'item-placeholder', ItemPlaceholderNodeProperties> {
}
/**
 * A definition of the [[itemPlaceholder]] node.
 * See the [[itemPlaceholder]] documentation to find out more.
 */
export interface ItemPlaceholderNodeDefinition extends NodeDefinition<'item-placeholder', ItemPlaceholderNodeProperties> {
}
export interface ItemPlaceholderNodeProperties {
    results: Array<ItemOperationResult>;
    isEmpty: boolean;
    path: Array<OperationPathPart>;
    queryBuilder: QueryBuilder;
}
/**
 * An implementation of the [[itemPlaceholder]] node.
 * See the [[itemPlaceholder]] documentation to find out more.
 */
export declare const ItemPlaceholderNodeType: StatelessNodeType<'item-placeholder', ItemPlaceholderNodeProperties>;
/**
 * Creates a new instance of the [[itemPlaceholder]] node. This node is used internally by [[proxy]] and [[placeholder]]
 * nodes to enable queries against collection items. The [[itemPlaceholder]] node is responsible for gathering information
 * about which operations are subscribed to items from a given 'remote' collection, and what parameters were used when
 * calling given operation.
 */
export declare function itemPlaceholder(queryBuilder: QueryBuilder, path: Array<OperationPathPart>, results: Array<ItemOperationResult>, isEmpty?: boolean): ItemPlaceholderNodeDefinition;
export declare function isItemPlaceholderNodeDefinition(value: NodeDefinition): value is ItemPlaceholderNodeDefinition;