React-router: there is no "createMemoryHistory" in v4, how to make the router link to a url manually?

[songdun]

when I use the v3, I can use
const createMemoryHistory= require('react-router').createMemoryHistory; createMemoryHistory.push(url) to make the router link to a url manually,
but now I update react-router to the v4, there is no "createMemoryHistory", so what can I do ? I also need to make the router link to a url manually， without <link>.

[pshrmn]

createMemoryHistory comes from the history library.

import { createMemoryHistory } from 'history'