class Stopwatch implements TestRule { private final Stopwatch$Clock clock; private volatile long startNanos; private volatile long endNanos; public void Stopwatch(); void Stopwatch(Stopwatch$Clock); public long runtime(java.util.concurrent.TimeUnit); protected void succeeded(long, org.junit.runner.Description); protected void failed(long, Throwable, org.junit.runner.Description); protected void skipped(long, org.junit.AssumptionViolatedEx, org.junit.runner.Description); protected void finished(long,...