import Koa from 'koa';
import { AbstractServeAdapter, ServeOptions } from './serve';
export declare class KoaAdapter extends AbstractServeAdapter {
    readonly sourceToken?: string | undefined;
    readonly options: ServeOptions;
    private app;
    constructor(sourceToken?: string | undefined, options?: ServeOptions);
    serve(): void;
    middleware(): Koa.Middleware;
}