import { LitElement } from 'lit';
import { BpTypeElement } from '@blueprintui/components/internals';
/**
 * ```typescript
 * import '@blueprintui/components/include/button.js';
 * ```
 *
 * ```html
 * <bp-button-group>
 *   <bp-button></bp-button>
 *   <bp-button></bp-button>
 * </bp-button-group>
 * ```
 *
 * @summary The button group component is used to group together related buttons and present them as a single visual unit.
 * @element bp-button-group
 * @since 1.0.0
 * @slot - button content
 */
export declare class BpButtonGroup extends LitElement implements Pick<BpTypeElement, keyof BpButtonGroup> {
    #private;
    /** Controls the visual styling variant applied to all buttons within the group */
    accessor action: 'primary' | 'secondary' | 'flat';
    private accessor buttons;
    static styles: CSSStyleSheet[];
    render(): import("lit").TemplateResult<1>;
    connectedCallback(): void;
}