docs: private static void _reset() {
          // clear metrics
          HystrixCommandMetrics.reset();
          HystrixThreadPoolMetrics.reset();
          HystrixCollapserMetrics.reset();
          // clear collapsers
          HystrixCollapser.reset();
          // clear circuit breakers
          HystrixCircuitBreaker.Factory.reset();
          HystrixPlugins.reset();
          HystrixPropertiesFactory.reset();
          currentCommand.set(new ConcurrentStack<HystrixCommandKey>());
      }