import { Observable } from 'rxjs';
import { StorageEngine } from './storage-engine';
export declare class Store {
    private engine?;
    private data;
    constructor(engine?: StorageEngine);
    get(key: string, defaultValue?: any): Observable<any>;
    value(key: string, defaultValue?: any): any;
    save(key: string, value: any): void;
    appendItem(key: string, value: any, checkFunction?: (item: any) => boolean): void;
    appendItems(key: string, value: any[], checkFunction?: (item: any) => boolean): void;
    prependItem(key: string, value: any, checkFunction?: (item: any) => boolean): void;
    prependItems(key: string, value: any[], checkFunction?: (item: any) => boolean): void;
    updateItem(key: string, value: any, force?: boolean, checkFunction?: (item: any) => boolean): void;
    updateItems(key: string, value: any, force?: boolean, checkFunction?: (item: any) => boolean): void;
    deleteItem(key: string, value: any): void;
    dispose(): void;
    clearStorageData(): void;
    getEngine(): StorageEngine;
    private getSubject;
}