export declare type NtButtonGroupColor = '' | 'primary' | 'secondary' | 'success' | 'warning' | 'alert';
export declare type NtButtonGroupSize = '' | 'tiny' | 'small' | 'large' | 'medium';
export declare class NtButtonGroupComponent {
    private _expanded;
    color: NtButtonGroupColor;
    size: NtButtonGroupSize;
    expanded: boolean;
}
