export declare class DetailsAnimationController {
    private detailsElement;
    private summaryElement;
    private contentElement;
    private animation?;
    private isClosing;
    private isExpanding;
    constructor(detailsElement: HTMLDetailsElement, summaryElement: HTMLElement, contentElement: HTMLElement);
    private handleSummaryClick;
    open(): void;
    private expand;
    private collapse;
    private animateContentHeight;
    private onAnimationFinish;
}
