code: public void trip() {
          if (state != BreakerState.OPEN) {
              openCount.getAndIncrement();
          }
          state = BreakerState.OPEN;
          lastFailure.set(clock.currentTimeMillis());
          isAttemptLive = false;
  
          notifyBreakerStateChange(getStatus());
      }
docs: Causes the {@link CircuitBreaker} to trip and OPEN; no new
  requests will be allowed until the <code>CircuitBreaker</code>
  resets.