JsonArray and JSONArray

hi,
I have noticed this
https://vaadin.com/book/vaadin7/-/page/advanced.javascript.html
is using JsonArray comeing from
 elemental.json.JsonArray not as described here
https://vaadin.com/wiki/-/wiki/Main/Exposing+server+side+API+to+JavaScript
import org.json.JSONArray;
how can in convert one to another?
 

As per https://vaadin.com/wiki/-/wiki/Main/Exposing+server+side+API+to+JavaScript warning, WARNING: This wiki page was last edited over a year ago and might be outdated, it definitely is. Please see https://vaadin.com/download/release/7.4/7.4.5/release-notes.html - The org.json and com.google.gwt.json libraries have been replaced by elemental.json.

Just change JSONArray to JsonArray and fix the imports. This is if you're using Vaadin 7.4.5+ which is the case in https://vaadin.com/book/vaadin7/-/page/advanced.javascript.html.

I meant how to convert JsonArray to JSONArray becayse there is no tutorial how to work with JsonArray from elemental import.