export declare type ElementIndexStruct = {
    element: Element;
    index: number;
};
/**
 * debounce is a generic implementation of a "debounce" pattern
 * to prevent calls of
 * @param func
 * @param wait
 * @param immediate
 */
export declare const debounce: <T>(func: T, wait: number, immediate?: boolean) => T;
/**
 *
 * @param {HTMLElement} scrollContainerElement
 * @param {number} boundaryRatio
 * @returns {(elements: Array<Element>, event?: Event) => (ElementIndexStruct | null)}
 */
export declare const generateGetMiddleElementStruct: (scrollContainerElement: HTMLElement, boundaryRatio: number) => (elements: Element[], event?: Event | undefined) => ElementIndexStruct | null;