## Set types { #set-types }

But then we think about it, and realize that tags shouldn't repeat, they would probably be unique strings.

And Python has a special data type for sets of unique items, the `set`.

Then we can declare `tags` as a set of strings:

{* ../../docs_src/body_nested_models/tutorial003_py310.py hl[12] *}

                  }

                  @Override
                  public NavigableMap<String, Integer> create(Object... elements) {
                    NavigableSet<String> set = Sets.newTreeSet(Ordering.natural());
                    for (Object e : elements) {
                      Entry<?, ?> entry = (Entry<?, ?>) e;
                      checkNotNull(entry.getValue());

	sys.hMutex.RLock()
	defer sys.hMutex.RUnlock()
	if h, ok := sys.hc[ep.Host]; ok {
		return !h.Online
	}
	go sys.initHC(ep)
	return false
}

// markOffline sets endpoint to offline if network i/o timeout seen.
func (sys *BucketTargetSys) markOffline(ep *url.URL) {
	sys.hMutex.Lock()
	defer sys.hMutex.Unlock()
	if h, ok := sys.hc[ep.Host]; ok {
		h.Online = false

 */
public class JavadocConverter {
    private static final Pattern HEADER_PATTERN = Pattern.compile("h(\\d)", Pattern.CASE_INSENSITIVE);
    private static final Pattern ACCESSOR_COMMENT_PATTERN = Pattern.compile("(?:returns|sets)\\s+(the|whether)\\s+", Pattern.CASE_INSENSITIVE);
    private final Document document;
    private final JavadocLinkConverter linkConverter;

    public JavadocConverter(Document document, JavadocLinkConverter linkConverter) {

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.collect.Iterables;
import com.google.common.collect.Range;
import com.google.common.collect.Sets;
import com.google.common.primitives.Ints;
import com.google.common.util.concurrent.internal.InternalFutureFailureAccess;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

     */
    public void delete(final FailureUrl failureUrl) {

        failureUrlBhv.delete(failureUrl, op -> {
            op.setRefreshPolicy(Constants.TRUE);
        });

    }

    /**
     * Sets up the condition builder for listing failure URLs with pagination and filtering.
     *
     * @param cb the condition builder to configure
     * @param failureUrlPager the pager containing filter criteria
     */

 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.util.concurrent;

import static com.google.common.collect.Sets.newConcurrentHashSet;
import static java.util.Objects.requireNonNull;
import static java.util.concurrent.atomic.AtomicIntegerFieldUpdater.newUpdater;
import static java.util.concurrent.atomic.AtomicReferenceFieldUpdater.newUpdater;

    /**
     * Default constructor.
     */
    public PopularWordHelper() {
        // Default constructor
    }

    /**
     * Initializes the PopularWordHelper after dependency injection.
     * Sets up the cache with configured size and expiration settings.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

   * Executor#execute(Runnable) execute()} method is called when this service is started, and should
   * return promptly.
   *
   * <p>The default implementation returns a new {@link Executor} that sets the name of its threads
   * to the string returned by {@link #serviceName}
   */
  protected Executor executor() {
    return command -> newThread(serviceName(), command).start();
  }

  @Override

import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import com.google.common.collect.MapMaker;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.google.j2objc.annotations.Weak;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumMap;
import java.util.List;
import java.util.Map;