export declare class LocalStorageService {
    constructor();
    /**
    * @param Object {key:value}
    * this.storage.set({key: value}).then((res) => {
    *    console.log(res);
    * });
    */
    set(obj: any): Promise<boolean>;
    setItem(obj: any): void;
    /**
     * @param Object {key:{object}}
     * this.storage.setObject({key: object}).then((res) => {
     * console.log(res);
     * });
    */
    setObject(obj: any): Promise<boolean>;
    setItemObject(obj: any): void;
    /**
     * this.storage.get('key').then((res) => {
     *    console.log(res);
     * });
     */
    get(key: string): Promise<string>;
    getItem(key: string): string;
    /**
     * this.storage.getObject('key').then((res) => {
     *   console.log(res);
     * });
    */
    getObject(key: string): Promise<any>;
    getItemObject(key: string): any;
    delete(key: string): Promise<{}>;
    clear(): Promise<{}>;
    /**
     * @param Object {key:value}
     * @return Callback Function
     * @Deprecated
     */
    setCallback(obj: any, callback?: (body: any) => void): void;
    /**
     * @param Object {key:{object}}
     * @return Callback Function
     * @Deprecated
     */
    setObjectCallback(obj: any, callback?: (body: any) => void): void;
    /**
     * @Deprecated
     */
    getCallback(key: string, callback: (body: any) => void): void;
    /**
     * @Deprecated
     */
    getObjectCallback(key: string, callback: (body: any) => void): void;
}