Tracers { Tracer getCurrent() { return ThreadLocalTracerStore.getCurrent().or(NOOP_TRACER); }    }
@Test public void getCurrent_threadlocal() { ThreadLocalTracerStore.setCurrent(mockTracer); Tracer tracer = new Tracers().getCurrent(); assertThat(tracer).isSameAs(mockTracer); ThreadLocalTracerStore.remove(); }