declare class SubHeaderElement extends HTMLElement {
    filterInput: HTMLInputElement;
    shownItemsOnExpandedFilter: HTMLElement[];
    filterExpandButton: HTMLElement[];
    connectedCallback(): void;
    setupFilterInputClearButton(): void;
    toggleFilterInputClearButton(): void;
    expandFilterInput(): void;
    collapseFilterInput(): void;
    private waitForCondition;
}
declare global {
    interface Window {
        SubHeaderElement: typeof SubHeaderElement;
    }
}
export {};