import { Option } from './option';
declare type Text<P> = P extends 'text' ? string : never;
declare type Label<P> = P extends 'label' ? string : never;
export declare class OptionGroup<P extends 'text' | 'label', O extends Option<P> = Option<P>> {
    text: Text<P>;
    label: Label<P>;
    options?: O[];
    constructor(propName: P, propValue: string);
    updateText: (cb: (text: Text<P>) => Text<P>) => void;
    updateLabel: (cb: (label: Label<P>) => Label<P>) => void;
    addOption: (option: O) => void;
}
export {};