Alternative java thread-local ScopeManager

[Milan Mimica]

Hello

Can I get your opinion on this thread-local scope implementation: https://pastebin.com/sFbgjVSj

Does is comply to the standard?

I find it much more easy to understand than current io.opentracing.util.ThreadLocalScopeManager and, more importantly, it has the benefit of the thread-local reference being immutable. This allows for easy cooperation with kotlin coroutines.

CoroutinesScope(GlobalTracer.get().scopeManager().tlsScope.asContextElement()) and voila! Coroutines context-local tracing.