import React from 'react';
import { List, ListItemData } from '../List';
import { SelectProps, SelectOption, SelectOptionGroup } from './types';
declare type GroupTitleItem = {
    label: string;
    disabled: true;
};
export declare type FlattenOption = SelectOption | GroupTitleItem;
export declare const getFlattenOptions: (options: (SelectOption | SelectOptionGroup)[]) => FlattenOption[];
export declare const getPopupItemHeight: (args: {
    getOptionHeight?: SelectProps['getOptionHeight'];
    size: NonNullable<SelectProps['size']>;
    option: FlattenOption;
    index: number;
}) => number;
export declare const getPopupHeight: (args: {
    getOptionHeight?: SelectProps['getOptionHeight'];
    size: NonNullable<SelectProps['size']>;
    options: FlattenOption[];
}) => number;
export declare const getPopupVerticalOffset: (args: {
    popupHeight: number;
    controlRect?: DOMRect;
}) => number;
export declare const getOptionsText: (flattenOptions: FlattenOption[], value: string[]) => string[];
export declare const getOptionsFromChildren: (children: SelectProps['children']) => (SelectOption | SelectOptionGroup)[];
export declare const getPopupMinWidth: (virtualizeEnabled: boolean, controlRect?: DOMRect | undefined) => number | undefined;
export declare const getNextQuickSearch: (keyCode: string, quickSearch: string) => string;
export declare const findItemIndexByQuickSearch: (quickSearch: string, items?: ListItemData<FlattenOption>[] | undefined) => number;
export declare const getListItems: (listRef: React.RefObject<List<FlattenOption>>) => ListItemData<FlattenOption>[];
export declare const getActiveItem: (listRef: React.RefObject<List<FlattenOption>>) => ListItemData<FlattenOption> | undefined;
export declare const activateFirstClickableItem: (listRef: React.RefObject<List<FlattenOption>>) => void;
export {};