Determine concurrency count for Resilience4j bulkhead

I'd like to track the concurrency levels of my bulkhead in an application for monitoring purposes.

Is the concurrency count for a Resiliency4j bulkhead externally available?

I can keep tack of it myself with the onCallPermitted and onCallFinished event callbacks, but I would rather not have to keep track of that if it is already available.

Bulkhead.getMetrics does the trick.