/**
 * @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */
declare const UIModel_base: {
    new (): import("@ckeditor/ckeditor5-utils").Observable;
    prototype: import("@ckeditor/ckeditor5-utils").Observable;
};
/**
 * The base MVC model class.
 */
export declare class UIModel extends /* #__PURE__ */ UIModel_base {
    [x: string]: unknown;
    /**
     * Creates a new Model instance.
     *
     * @param attributes The model state attributes to be defined during the instance creation.
     * @param properties The (out of state) properties to be appended to the instance during creation.
     */
    constructor(attributes?: Record<string, unknown>, properties?: Record<string, unknown>);
}
export {};