/**
 * Groups tools by removing the border between them and
 * normalizing spacing.
 *
 * @export
 * @param {HTMLElement} toolbar The Kendo's toolbar.
 * @param {string} insertingToolSelector The starting tool.
 * @param {string} destinationToolSelector The end tool.
 * @param {boolean} isAtTheEnd Is as the end of the toolbar.
 */
export declare function groupToolbarButtons(toolbar: HTMLElement, insertingToolSelector: string, destinationToolSelector: string, isAtTheEnd: boolean): void;
