import { EntityOrder } from '../database';
/**
 * Takes a single unknown parameter and makes sure that it's a single string or
 * an array of strings, and returns as an array.
 */
export declare function parseStringsParam(param: unknown, ctx: string): string[] | undefined;
export declare function parseEntityOrderFieldParams(params: Record<string, unknown>): EntityOrder[] | undefined;
export declare function isOrder(order: string): order is 'asc' | 'desc';