Add a comment on immutable import

chibicode · chibicode · commit c435e5221784 · 2015-08-26T11:10:11.000-07:00
diff --git a/README.md b/README.md
@@ -8,6 +8,7 @@ React JSON Viewer Component, Extracted from [redux-devtools](https://github.com/
 
 ```js
 import JSONTree from 'react-json-tree'
+// If you're using Immutable.js: `npm i --save immutable`
 import { Map } from 'immutable'
 
 // Inside a React component:
