/**
 * A utility class for managing persistent storage of data in the browser's localStorage.
 * Provides type-safe methods to save, retrieve, and remove key-value pairs.
 * @template T The type of data being stored.
 */
export declare class Store<T> {
    /**
     * The unique identifier used to store and retrieve data from localStorage.
     */
    private readonly _key;
    /**
     * Creates a new Store instance.
     * @param {string} key The unique identifier for storing data.
     * @param {T} data The initial data to be stored.
     * @throws {Error} If the provided key is empty or contains only whitespace.
     */
    constructor(key: string, data: T);
    /**
     * Creates a new Store instance from existing localStorage data.
     * @param {string} key The key to lookup in localStorage.
     * @returns {Store<T> | null} A new Store instance if data exists, null otherwise.
     */
    static fromKey<T>(key: string): Store<T> | null;
    /**
     * @returns {T} The stored data associated with this instance's key.
     * @throws {StorageDataNotFoundError} If no data exists for the current key.
     */
    getData(): T;
    /**
     * @param {T} data - The data to persist in localStorage.
     */
    save(data: T): void;
    /**
     * Removes the stored data associated with this instance's key.
     */
    remove(): void;
    /**
     * Validates that a key is non-empty and contains non-whitespace characters.
     * @param {string} key The key to validate.
     * @throws {InvalidStorageKeyError} If the key is invalid.
     */
    private _assertKeyIsValid;
}