import { Filter, Sort, LineItem } from '../common';
import * as Request from '../request';
/**
 * Validate presence of parameter.
 */
export declare function validatePresence<T>(name: string, value: T | T[]): void;
/**
 * Validate list request parameters.
 * @param req Common parameters used in list requests.
 */
export declare function validateList({ filters, sort }: Request.Params.List): void;
export declare function validateFilters(filters: Filter[]): void;
export declare function validateSortings(sortings: Sort[]): void;
export declare function validateLineItems(items: LineItem[]): void;