import * as React from "react";
import { IOWidget, Sum } from "./widget";
export interface EitherProps<i, o1, o2> {
    input: i;
    widget1: IOWidget<i, o1>;
    widget2: IOWidget<i, o2>;
    on_done_either: (output: Sum<o1, o2>) => void;
}
export interface EitherState<i, o1, o2> {
}
export declare class Either<i, o1, o2> extends React.Component<EitherProps<i, o1, o2>, EitherState<i, o1, o2>> {
    constructor(props: EitherProps<i, o1, o2>, context: any);
    render(): JSX.Element;
}
export declare let either: <i, o1, o2>(widget1: IOWidget<i, o1>, widget2: IOWidget<i, o2>) => IOWidget<i, Sum<o1, o2>>;