import { Logger } from "@azure/msal-common";
import { IWindowStorage } from "./IWindowStorage.js";
export declare class BrowserExtensionSessionStorage implements IWindowStorage<string> {
    private readonly logger;
    private allSettings;
    private initialized;
    constructor(logger: Logger);
    initialize(): Promise<void>;
    getItem(key: string): string | null;
    getUserData(key: string): string | null;
    setItem(key: string, value: string): void;
    setUserData(key: string, value: string): Promise<void>;
    removeItem(key: string): void;
    getKeys(): string[];
    containsKey(key: string): boolean;
}
//# sourceMappingURL=BrowserExtensionSessionStorage.d.ts.map