export declare const CSS: {
  container: string;
  arrow: string;
  imageContainer: string;
  closeButtonContainer: string;
  closeButton: string;
  content: string;
  hasHeader: string;
  header: string;
  headerContent: string;
  heading: string;
};
export declare const TEXT: {
  close: string;
};
export declare const POPOVER_REFERENCE = "data-calcite-popover-reference";
export declare const ARIA_CONTROLS = "aria-controls";
export declare const ARIA_EXPANDED = "aria-expanded";
export declare const HEADING_LEVEL = 2;