import { Nullable, Optional } from '../utils/types';
export type SelectOption = HTMLOptionElement | HTMLOptGroupElement;
export declare const hideOptions: (select: Nullable<HTMLSelectElement>, selectMarkedReadOnly: Optional<boolean>) => void;
export declare const isManipulateEvent: (eventKey: string) => boolean;
export declare const addOption: (select: HTMLSelectElement) => ((option: SelectOption) => void);