So far the best option seems kSOAP:
an example is here:
When you create an app prototype with Adobe XD, you can insert system screens -- sharing or Control Center, for example -- with just a few clicks. This video shows you how. You can take the full course on Experts Exchange at http://bit.ly/XDcourse.
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To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…