/**
 * Refreshes (updates) a viewport label for a single viewport element.
 * Creates the label if it doesn't exist, or updates its position if it does.
 * Similar to refreshHighlightFrame - updates existing elements rather than recreating.
 *
 * @param viewportElement - The viewport element to refresh the label for
 */
export declare const refreshViewportLabel: (viewportElement: HTMLElement) => void;