/**
 * PXM Select Group Component
 *
 * Groups related select items together with an optional label
 */
export declare class PxmSelectGroup extends HTMLElement {
    private initialized;
    constructor();
    connectedCallback(): void;
    disconnectedCallback(): void;
    private initialize;
    private setupGroupStructure;
    getItems(): NodeListOf<HTMLElement>;
    getLabel(): HTMLElement | null;
}