/**
 * A simple util that will find all the tab focusable elements within a
 * container element.  The container should normally be a specific HTMLElement,
 * but it can also be the entire document if you want to find **all** focusable
 * elements within your page.
 *
 * @param container The container element/document to find focusable elements
 * within.
 * @param programatic Boolean if programatically focusable elements should be
 * included instead of only tab focusable.
 * @return A list of HTMLElements that are focusable within the container.
 */
export default function getFocusableElements(container: HTMLElement | Document, programatic?: boolean): HTMLElement[];