import { PharosElement } from '../base/pharos-element';
import type { TemplateResult, CSSResultArray } from 'lit';
/**
 * Pharos toggle button group component.
 *
 * @tag pharos-toggle-button-group
 *
 * @slot - Contains the buttons.
 *
 */
export declare class PharosToggleButtonGroup extends PharosElement {
    /**
     * The label used to announce this group to assistive technologies.
     * @attr group-label
     */
    groupLabel: string;
    private _allToggleButtons;
    private _selectedToggleButtons;
    static get styles(): CSSResultArray;
    protected firstUpdated(): Promise<void>;
    private _selectInitialToggleButton;
    private _handleButtonSelected;
    private _handleKeydown;
    private _handleArrowKeys;
    private _handleEnterKey;
    private _handleFocusout;
    protected render(): TemplateResult;
}
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