Prevent exceptions when using experimental syntax in effect commands #7996
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Problem
Currently, you will face an exception when attempting to use experimental syntax in effect commands:

Solution
The solution, for now, is to simply return an empty ExperimentSet if the ParserInstance is inactive. In the future, we will consider methods for using experimental syntax in effect commands, but that is out of scope for this PR/2.12
Testing Completed
Manual testing confirms the issue is resolved:

Supporting Information
n/a
Completes: none
Related: none