/**
 * Handles the logic of switching tabs, updating ARIA attributes, and syncing state.
 * @param tabContainer The main container of the tab system.
 * @param newActiveHeader The header element of the tab to be activated.
 * @param originatedFromSync A flag to prevent cyclic updates with synced tabs.
 */
declare const switchTab: (tabContainer: HTMLDivElement, newActiveHeader: HTMLElement, originatedFromSync?: boolean) => void;
/**
 * Sets up a single tab container, wiring up ARIA attributes and event listeners.
 * @param tabContainer The main container element of a tab system to set up.
 */
declare const setupTabContainer: (tabContainer: HTMLDivElement) => void;
/**
 * Initializes all tab systems on the page.
 * Finds all tab containers and applies the setup logic to each.
 */
declare const loadTabs: () => void;