import { AggregationObject } from '../types.js';
export interface Aggregation extends Record<string, unknown> {
    $sort?: unknown;
    $group?: unknown;
    $reduce?: unknown;
    $project?: unknown;
    $unwind?: unknown;
    $root?: unknown;
}
export declare const makeIdInternal: (key: string) => string;
export declare const makeIdInternalInPath: <T extends {
    path?: string | string[] | undefined;
}>(query: T) => T;
export declare const extractLookupPaths: (aggregation?: AggregationObject[]) => string[];
export default function prepareAggregation(aggregation?: AggregationObject[], params?: Record<string, unknown>, isTopLevelPipeline?: boolean, useIdAsInternalId?: boolean): Aggregation[] | undefined;