export interface ClientAppStateReadOptions {
    signal?: AbortSignal;
}
export interface ClientAppStateWriteOptions {
    keepalive?: boolean;
    requestSource?: string;
    signal?: AbortSignal;
}
export declare function readClientAppState<T = unknown>(key: string, options?: ClientAppStateReadOptions): Promise<T | null>;
export declare function writeClientAppState<T = unknown>(key: string, value: T, options?: ClientAppStateWriteOptions): Promise<T>;
export declare function deleteClientAppState(key: string, options?: ClientAppStateWriteOptions): Promise<void>;
export declare function setClientAppState<T = unknown>(key: string, value: T | null | undefined, options?: ClientAppStateWriteOptions): Promise<T | null>;
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