/**
 * @description - creation operator, detect specific path is directory, pass through when yes, transparent when no
 * @author - huang.jian <hjj491229492@hotmail.com>
 */
import { OperatorFunction } from 'rxjs';
import type { FileSystem } from '../interface/fs';
import type { NormalRequest } from '../interface/resolver';
export declare function isFileRequest(fs: FileSystem): OperatorFunction<NormalRequest, NormalRequest>;