/*
         * We can't inherit the normal implementation (which calls
         * Sets.removeAllImpl(Set, *Collection*)) because, under some
         * circumstances, it attempts to call columnKeySet().iterator().remove,
         * which is unsupported.
         */
        checkNotNull(c);
        return Sets.removeAllImpl(this, c.iterator());
      }

      @Override

 *  Fix: Don't crash in SPDY and HTTP/2 when disconnecting before connecting.
 *  Fix: Avoid a reverse DNS-lookup for a numeric proxy address
 *  Fix: Resurrect http/2 frame logging.
 *  Fix: Limit to 20 authorization attempts.

## Version 2.1.0

_2014-11-11_

 *  New: Typesafe APIs for interacting with cipher suites and TLS versions.
 *  Fix: Don't crash when mixing authorization challenges with upload retries.

    protected boolean usePersistentHandles = false;
    /** Timeout for durable handles in milliseconds */
    protected long durableHandleTimeout = 120000; // 2 minutes
    /** Maximum number of retry attempts for handle reconnection */
    protected int handleReconnectRetries = 3;
    /** Directory to store persistent handle state */
    protected String handleStateDirectory;

    // Directory leasing configuration fields

          helper = new SynchronizedHelper();
        }
      }
    } else {
      /*
       * We avoid Unsafe, since newer JVMs produce warnings or even errors for attempts to use it.
       *
       * In guava-jre, we avoid Unsafe by using VarHandle instead. But if we have references to
       * VarHandle in guava-android, even if they're unused under Android, we cause errors under

     */
    long getDurableHandleTimeout();

    /**
     * Property {@code jcifs.smb.client.handleReconnectRetries}, defaults to 3
     *
     * @return maximum number of retry attempts for handle reconnection
     */
    int getHandleReconnectRetries();

    /**
     * Enable SMB3 Multi-Channel support
     *
     * Property {@code jcifs.smb.client.useMultiChannel} (boolean, default true)

                 * Store references to the map and key so that
                 * SmbFile.resolveDfs can re-insert the dr list with
                 * the dr that was successful so that subsequent
                 * attempts to resolve DFS use the last successful
                 * referral first.
                 */
                tmp.setCacheMap(links.map);
                tmp.setKey("\\");
                tmp = tmp.next();

   * multimap.asMap()} view. Repeated occurrences of an entry in the multimap after the first are
   * ignored.
   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is
   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *

          }
        };
    assertThat(testFuture.toString())
        .matches("[^\\[]+\\[status=SUCCESS, result=\\[java.lang.Boolean@\\w+\\]\\]");
  }

  /**
   * This test attempts to cause a future to wait for longer than it was requested to from a timed
   * get() call. As measurements of time are prone to flakiness, it tries to assert based on ranges

      acquiredLockList.add(node);
    }
  }

  /**
   * CycleDetectingLock implementations must call this method in a {@code finally} clause after any
   * attempt to change the lock state, including both lock and unlock attempts. Failure to do so can
   * result in corrupting the acquireLocks set.
   */
  private static void lockStateChanged(CycleDetectingLock lock) {
    if (!lock.isAcquiredByCurrentThread()) {

            }
            return result;
        } catch (final Exception e) {
            throw new SsoLoginException("Failed to get a token.", e);
        }
    }

    /**
     * Attempts to refresh tokens silently using the MSAL4J silent authentication flow.
     * @param user The Azure AD user whose tokens need to be refreshed.
     * @return The new authentication result, or null if silent refresh failed.