import { LitElement, PropertyValues } from 'lit';
import { InteractionExpandController } from '@blueprintui/components/internals';
/**
 * Button
 *
 * ```typescript
 * import '@blueprintui/components/include/nav.js';
 * ```
 *
 * ```html
 * <bp-nav-group>submit</bp-nav-group>
 * ```
 *
 * @element bp-nav-group
 * @since 1.0.0
 * @event open - when element is expanded
 * @event close - when element is collapsed
 * @slot - bp-nav-item elements
 */
export declare class BpNavGroup extends LitElement {
    #private;
    /** determine if element is expanded */
    accessor expanded: boolean;
    /** determine if element should auto manage expanded state */
    accessor interaction: 'auto';
    static styles: CSSStyleSheet[];
    /** @private */
    interactionExpandController: InteractionExpandController<this>;
    /** @private */
    _internals?: ElementInternals;
    render(): import("lit").TemplateResult<1>;
    connectedCallback(): void;
    updated(props: PropertyValues<this>): void;
}