Is anyone aware of a plug-in in AppMarket or ability to create a custom picker to support selecting deployed application in an appian environment?
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https://community.appian.com/b/appmarket/posts/application-information-retriever
This one still works on my 20.2 build.
And you can follow a custom picker pattern in the docs here:
https://docs.appian.com/suite/help/20.2/recipe-configure-an-array-picker.html