Return Profiler old interval from setInterval

[jackshirazi]

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

[breedx-splk]

nit: I prefer this flipped, but not a huge deal.

[breedx-splk]

LGTM

[laurit]

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

This would only be true when the caller is recompiled against the new api, if is is not it will fail with NoSuchMethodError. I guess it is fine since probably nobody besides you uses it.