/**
 * Handles the data-testid attribute for a given element.
 *
 * @param element - The element to set or remove the data-testid attribute on.
 * @param componentDataTestid - The base data-testid for the component.
 * @param dataTestidAppend - The string to append to the base data-testid.
 *
 * If componentDataTestid is not null or whitespace, sets the data-testid attribute
 * on the element as `${componentDataTestid}-${dataTestidAppend}`.
 * Otherwise, removes the data-testid attribute from the element.
 */
export declare function handleDataTestid(element: any, componentDataTestid: string | undefined, dataTestidAppend: string): void;