code: public CircuitBreakerBuilder circuitOpenWindow(Duration circuitOpenWindow) {
          requireNonNull(circuitOpenWindow, "circuitOpenWindow");
          if (circuitOpenWindow.isNegative() || circuitOpenWindow.isZero()) {
              throw new IllegalArgumentException(
                      "circuitOpenWindow: " + circuitOpenWindow + " (expected: > 0)");
          }
          this.circuitOpenWindow = circuitOpenWindow;
          return this;
      }
docs: Sets the duration of OPEN state.
  Defaults to {@value Defaults#CIRCUIT_OPEN_WINDOW_SECONDS} seconds if unspecified.