import { DaoBase } from '../../../services/state-machines/dao.abstract';
import { MongodbService } from '../../../services/mongodb/mongodb.service';
export declare class GraderDaoService extends DaoBase {
    private readonly mongoConnection;
    protected getCollection(): any;
    protected isCoupledThing(): boolean;
    private graderCollection;
    constructor(mongoConnection: MongodbService);
}