import { AnyParamConstructor } from '@typegoose/typegoose/lib/types';
import { PipelineStage } from 'mongoose';
import { ExoAggrSuper } from '../ExoAggrSuper';
import { ASProjection } from './accessories/ASProjection';
export declare class AggrStagePopulate<T extends AnyParamConstructor<any>> extends ASProjection<T> {
    private $field;
    constructor($aggr: ExoAggrSuper<T>, field: string);
    private arr;
    private from;
    private baseFieldsParser;
    get pipes(): PipelineStage[];
    clone($aggr: ExoAggrSuper<T>): AggrStagePopulate<T>;
}