import { HttpApp, HttpPlugin, PluginManager, PluginRegistry } from './types';
export declare class HttpPluginManager implements PluginManager {
    private registry;
    constructor(registry?: PluginRegistry);
    usePlugin(plugin: HttpPlugin, options?: any): void;
    listPlugins(): HttpPlugin[];
    getPlugin(pluginName: string): HttpPlugin | undefined;
    isPluginLoaded(pluginName: string): boolean;
    getInstalled(): HttpPlugin[];
    private getApp;
    setApp(app: HttpApp): void;
    private getAppInstance;
}