/**
 * Mock implementation of ResizeObserver for testing purposes
 */
export declare class MockResizeObserver implements ResizeObserver {
    callbacks: Function[];
    elements: Element[];
    constructor(callback: Function);
    observe(element: Element): void;
    unobserve(element: Element): void;
    disconnect(): void;
    trigger(entries: ResizeObserverEntry[]): void;
}