import { ISettableObservable } from '@vscode/observables';
export interface LocalStorageObservableOptions<T> {
    readonly storageKey: string;
    readonly defaultValue: T;
    /** Serialize value to string for localStorage. Defaults to JSON.stringify. */
    readonly serialize?: (value: T) => string;
    /** Deserialize string from localStorage. Defaults to JSON.parse. */
    readonly deserialize?: (raw: string) => T;
}
/**
 * Creates an observable that persists its value to localStorage.
 * The value is loaded from localStorage on creation (if present),
 * and saved to localStorage whenever it changes.
 */
export declare function createLocalStorageObservable<T>(owner: object, options: LocalStorageObservableOptions<T>): ISettableObservable<T>;
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