import { OnDestroy, OnInit } from '@angular/core';
import { MatSort, Sort } from '@angular/material';
import { StorageService } from 'ngx-webstorage-service';
/**
 * Directives which persists the sort of MatSort in StorageService.
 */
export declare class PersistedSortDirective implements OnInit, OnDestroy {
    private readonly matSort;
    private readonly storage;
    key: string;
    private readonly sortChangeSubscription;
    constructor(matSort: MatSort, storage: StorageService<Sort>);
    ngOnInit(): void;
    ngOnDestroy(): void;
    private saveSort;
    private restoreSort;
    private readonly fullStorageKey;
}