Thanks for writing.
The screenshot you mentioned does not show a drawer. This is a custom mechanism we created solely for our Examples application. Since the source code of our examples is freely available you can study it and see how it is done. Also you can reuse it any way you want, no restrictions.
You can browse the source code on github
. Also, you can clone the whole repository if you want.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items