Please give an example of how to use ESTRequestGetDevices

You state in the iOS tutorial:

In a production app and with a large beacon deployment, you probably wouldn’t want to hard-code the beacon identifiers directly into your app.
Instead, it’s a good practice to dynamically fetch them from Estimote Cloud. If you’d like to look into that, check out the ESTRequestGetDevices class.

Can you give an example, please?