Example code missing components

[DewangS]

I was trying to run the example code from the Rich Text Editor https://github.com/ianstormtaylor/slate/blob/main/site/examples/richtext.tsx but noticed that it refers to an import of Button, Icon and Toolbar from one level above components folder (import { Button, Icon, Toolbar } from '../components') though under the examples, there is not 'components' folder. Can someone please let me know where do I find these components?

error.... Can't resolve '../components'

I'm using code from https://github.com/ianstormtaylor/slate/blob/main/site/examples/richtext.tsx