In Studio whenever you write ##class( and then you start writing it will autocomplete the classname.
I can't find how to do that in atelier.
Atelier is InterSystems’ Eclipse-based development environment. It enables you to rapidly build solutions that leverage the performance, scalability, connectivity, and reliability of InterSystems’ comprehensive data platform.
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Attention! Please put an Atelier version and/or InterSystems Data Platform server version in your Atelier question.