export declare class ResizeObserverMock {
    private static _instances;
    private callback;
    private _observe;
    private _unobserve;
    private _disconnect;
    constructor(callback: ResizeObserverCallback);
    static get instances(): ResizeObserverMock[];
    observe(element: Element): void;
    unobserve(element: Element): void;
    disconnect(): void;
    mockTrigger(entries: ResizeObserverEntry[]): void;
    simulateResize({ bottom, height, left, right, top, width, }?: {
        bottom?: number;
        height?: number;
        left?: number;
        right?: number;
        top?: number;
        width?: number;
    }): void;
}