/**
 * @description - spread node search paths, filter none exist directory
 * @author - huang.jian <hjj491229492@hotmail.com>
 */
import { Observable } from 'rxjs';
import type { FileSystem } from '../interface/fs';
import type { NormalRequest } from '../interface/resolver';
export declare function possible(fs: FileSystem, modules: string[], request: NormalRequest): Observable<NormalRequest>;