export declare type ViewportType = 'xs' | 'sm' | 'md' | 'lg';
export declare type RowKeyType = 'start' | 'center' | 'end' | 'top' | 'middle' | 'bottom' | 'around' | 'between';
export declare type ColKeyType = 'xs' | 'sm' | 'md' | 'lg' | 'xl' | 'xsOffset' | 'smOffset' | 'mdOffset' | 'lgOffset' | 'xlOffset';