import { SelectProps } from './types';
export declare const LIST_CLASSNAME: string;
export declare const SIZE_TO_ITEM_HEIGHT: Record<NonNullable<SelectProps['size']>, number>;
export declare const GROUP_ITEM_MARGIN_TOP = 5;
export declare const CONTAINER_VERTICAL_MARGIN = 4;
export declare const BORDER_WIDTH = 1;
export declare const POPUP_MIN_WIDTH_IN_VIRTUALIZE_CASE = 100;