import { NodeDefinition, StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../types/graph';
import { SchedulerFactory } from './schedulers/types';
import { QueryBuilder } from './utils/query-builder';
export interface ProxyNode extends StatelessGraphNode<'proxy', ProxyNodeProperties> {
}
export interface ProxyNodeDefinition extends StatelessNodeDefinition<'proxy', ProxyNodeProperties> {
}
export interface ProxyNodeProperties {
    middlewares: Array<NodeDefinition>;
    queryBuilder: QueryBuilder;
    schedulerFactory: SchedulerFactory;
}
export declare const ProxyNodeType: StatelessNodeType<'proxy', ProxyNodeProperties>;
export interface ProxyOptions {
    scheduler?: SchedulerFactory;
}
export declare function proxy(middlewares: Array<NodeDefinition>, options?: ProxyOptions): ProxyNodeDefinition;
export declare function isProxyNodeDefinition(value: NodeDefinition): value is ProxyNodeDefinition;
export declare type MiddlewareTransformer = (middlewares: Array<NodeDefinition>, proxyNode: ProxyNode) => Array<NodeDefinition>;
export declare function setTransformMiddlewares(fn: MiddlewareTransformer): void;