import { LitElement } from 'lit';
import type { Dropdown } from '@nvidia-elements/core/dropdown';
/**
 * @element nve-dropdown-group
 * @description A Dropdown Group streamlines the management of linked dropdowns and supports nested dropdowns for a more organized and intuitive user experience
 * @documentation https://nvidia.github.io/elements/docs/elements/dropdown-group/
 * @since 1.30.1
 * @entrypoint \@nvidia-elements/core/dropdown-group
 * @slot - default slot for dropdown content
 * @event open - Dispatched when a dropdown in the group opens
 * @event close - Dispatched when a dropdown in the group closes
 * @cssprop --arrow-transform - Transform applied to the popover arrow
 * @aria https://www.w3.org/WAI/ARIA/apg/patterns/menubar/
 */
export declare class DropdownGroup extends LitElement {
    #private;
    static styles: import("lit").CSSResult[];
    static readonly metadata: {
        tag: string;
        version: string;
        children: string[];
    };
    protected dropdowns: Dropdown[];
    render(): import("lit").TemplateResult<1>;
    connectedCallback(): void;
    disconnectedCallback(): void;
    /** Closes every descendant dropdown in the group. */
    close(): void;
}