// @flow
import * as React from "react";

type SetStateAction<S> = S | ((prevState: S) => S);
type Dispatch<A> = (value: A) => void;

export type Context = {|
  +setWidths: Dispatch<SetStateAction<number[]>>,
  +setCalculatedWidth: Dispatch<SetStateAction<number>>,
  +calculatedWidth: number,
|};

export type ProviderProps = {|
  +children: React.Node,
|};

declare export var ItineraryProvider: React.ComponentType<ProviderProps>;
declare export function useWidth(): Context;