/**
 * ######################################################################
 * #                                                                    #
 * #                       Do not change the file!                      #
 * #                                                                    #
 * # All changes are deleted the next time the collection data is read. #
 * #                                                                    #
 * ######################################################################
 */
import { Schema } from 'mongoose';
import { indexType } from './types';
/**
 *
 * @param schema
 * @param indexes
 */
export declare const addIndexes: (schema: Schema<any>, indexes: indexType[]) => void;
/**
 *
 * @param schema
 * @param virtual
 */
export declare const addVirtualProperties: (schema: Schema<any>, virtual: {
    [k: string]: {
        get?: (() => void) | undefined;
        set?: (() => void) | undefined;
    };
}) => void;
/**
 *
 * @param name
 * @param items
 */
export declare const checkDuplicateKeys: (name: string, items: {}[]) => void;
/**
 *
 * @param items
 */
export declare const getDuplicates: (items: string[]) => string[];
/**
 *
 * @param items
 */
export declare const extractKeys: (items: {}[]) => string[];