*     #hasNext()}
   */
  @ParametricNullness
  E peek();

  /**
   * {@inheritDoc}
   *
   * <p>The objects returned by consecutive calls to {@link #peek()} then {@link #next()} are
   * guaranteed to be equal to each other.
   */
  @CanIgnoreReturnValue
  @Override
  @ParametricNullness
  E next();

  /**
   * {@inheritDoc}
   *

 * according to when the first occurrence of the element was added. When the multiset contains
 * multiple instances of an element, those instances are consecutive in the iteration order. If all
 * occurrences of an element are removed, after which that element is added to the multiset, the
 * element will appear at the end of the iteration.
 *

    }

    /**
     * Creates a simple circuit breaker
     *
     * @param name the circuit breaker name
     * @param failureThreshold number of consecutive failures to open circuit
     * @param successThreshold number of successes in half-open to close circuit
     * @param timeoutMillis timeout before attempting to close open circuit
     */

 */
@GwtCompatible
public class Joiner {
  /** Returns a joiner which automatically places {@code separator} between consecutive elements. */
  public static Joiner on(String separator) {
    return new Joiner(separator);
  }

  /** Returns a joiner which automatically places {@code separator} between consecutive elements. */
  public static Joiner on(char separator) {
    return new Joiner(String.valueOf(separator));
  }

 */
@GwtCompatible
public class Joiner {
  /** Returns a joiner which automatically places {@code separator} between consecutive elements. */
  public static Joiner on(String separator) {
    return new Joiner(separator);
  }

  /** Returns a joiner which automatically places {@code separator} between consecutive elements. */
  public static Joiner on(char separator) {
    return new Joiner(String.valueOf(separator));
  }

        assertEquals("/etc/passwd.log", AdminLogAction.sanitizeFilename("../../etc/passwd.log"));
        assertEquals("/etc/passwd.log", AdminLogAction.sanitizeFilename("../../../etc/passwd.log"));

        // With multiple consecutive dots
        assertEquals("/test.log", AdminLogAction.sanitizeFilename("....//test.log"));
        assertEquals("/test.log", AdminLogAction.sanitizeFilename("......//....//test.log"));

        // Mixed patterns

            assertEquals("fe80::1", method.invoke(null, "fe80:0000:0000:0000:0000:0000:0000:0001"));

            // Leading zeros removed and consecutive zeros compressed
            assertEquals("2001:db8::1", method.invoke(null, "2001:0db8:0:0:0:0:0:1"));

            // Longest sequence of zeros compressed (3 zeros at end vs 1 zero at start)

                // Expected
            }
        }

        // Still closed
        assertEquals(SimpleCircuitBreaker.State.CLOSED, circuitBreaker.getState());

        // Success resets consecutive failures
        circuitBreaker.call(() -> "success");

        SimpleCircuitBreaker.Statistics stats = circuitBreaker.getStatistics();
        assertEquals(0, stats.consecutiveFailures);

                return true;
            }

            // Check if transport is failed
            if (transport.isFailed()) {
                return true;
            }

            // Check for consecutive failures
            String key = getConnectionKey(transport);
            AtomicInteger failures = consecutiveFailures.get(key);
            if (failures != null && failures.get() >= MAX_CONSECUTIVE_FAILURES) {

   * For example, {@code join(":", 0x01, 0x02, -0x01)} returns the string {@code "1:2:-1"}.
   *
   * @param separator the text that should appear between consecutive values in the resulting string
   *     (but not at the start or end)
   * @param array an array of {@code byte} values, possibly empty
   */
  public static String join(String separator, byte... array) {