Return Profiler old interval from setInterval #2354
                
     Merged
            
            
          
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Description:
setInterval() was void, but it's useful when resetting the interval to know what the previous interval was. We could add a new getInterval, but it seems more efficient to just return it from the setInterval()
Existing Issue(s):
Testing:
Documentation:
Outstanding items:
Note this technically breaks the existing InferredSpans class API, but shouldn't impact anything because existing calls to setInterval() are not assigning a return value, so will continue to work fine
Alternative Considered
We could instead add a getInterval() call