import { Flow as FlowDefinition } from '@chix/common';
import { LoaderResponse } from './interfaces';
import { Loader } from './loader';
import { PreloadResult } from './remote';
export interface NPMLoaderOptions {
    paths?: string[];
}
/**
 * Loads and saves definitions from npm.
 *
 * If npm is used, graphs cannot contain providers.
 *
 * All components must be available through npm installed packages.
 */
export declare class NPMLoader extends Loader {
    pkgKey: string;
    sources: {
        '@': {};
    };
    options: {
        paths: string[];
    };
    constructor(options?: NPMLoaderOptions);
    _init(): void;
    preload(): Promise<PreloadResult>;
    /**
     * Node Definitions from npm are already preloaded.
     *
     * In this case load just checks whether graph dependencies are
     * all known to the loader or else send an error back to the callback.
     *
     * @param {Object} flow
     * @param {Boolean} update
     */
    load(flow: FlowDefinition | FlowDefinition[]): Promise<LoaderResponse>;
    /**
     *
     * NPM loader does not store it's definitions
     *
     */
    saveNodeDefinition(): void;
}