import { CollectionHelper } from './collection-helper.service';
import { SortOrder } from 'ivy.angular.data';
export declare class SortOrderService {
    private collSvc;
    constructor(collSvc: CollectionHelper);
    sortCollection<T extends SortOrder>(items: T[]): void;
    getPreviousItem<T extends SortOrder>(items: T[], current: T): T;
    getPreviousItems<T extends SortOrder>(items: T[], current: T): T[];
    private internalGetPrevious;
}