import { Application } from '../Application';
import { ScalarsTypeMap } from '@tngraphql/graphql/dist/schema/build-context';
import { PubSubEngine, PubSubOptions } from 'graphql-subscriptions';
export declare class GraphQLKernel {
    app: Application;
    protected bootstrappers: Function[];
    /**
     * global middleware
     */
    protected middleware: any[];
    /**
     * Register name middleware
     */
    protected routeMiddleware: {};
    protected pubSub: PubSubEngine | PubSubOptions;
    protected scalarsMap: ScalarsTypeMap[];
    protected nullableByDefault: boolean;
    constructor(app: Application);
    handle(): Promise<void>;
    bootstrap(): Promise<void>;
    complie(): Promise<import("graphql").GraphQLSchema>;
}