void add(Runnable runnable, Executor executor);

    void execute();
    /** Returns the underlying implementation, useful for the Footprint benchmark. */
    Object getImpl();
  }

  enum Impl {
    NEW {
      @Override
      ExecutionListWrapper newExecutionList() {
        return new ExecutionListWrapper() {
          final ExecutionList list = new ExecutionList();

          @Override

     * cancellation purposes are the main reason to access `futures`, as discussed in its docs.)
     */
    this.futures = null;
  }

  enum ReleaseResourcesReason {
    OUTPUT_FUTURE_DONE,
    ALL_INPUT_FUTURES_PROCESSED,
  }

  /**
   * If {@code allMustSucceed} is true, called as each future completes; otherwise, if {@code

                CollectionFeature.ALLOWS_NULL_QUERIES)
            .createTestSuite());

    suite.addTestSuite(ImmutableSortedSetTest.class);

    return suite;
  }

  // enum singleton pattern
  private enum StringLengthComparator implements Comparator<String> {
    INSTANCE;

    @Override
    public int compare(String a, String b) {
      return a.length() - b.length();
    }
  }

      }
      ImmutableDoubleArray iia = builder.build();
      for (int j = 0; j < iia.length(); j++) {
        assertThat(iia.get(j)).isEqualTo((double) j);
      }
    }
  }

  private enum BuilderOp {
    ADD_ONE {
      @Override
      void doIt(ImmutableDoubleArray.Builder builder, AtomicInteger counter) {
        builder.add(counter.getAndIncrement());
      }
    },
    ADD_ARRAY {

import org.codelibs.fess.suggest.constants.SuggestConstants;
import org.codelibs.fess.suggest.util.SuggestUtil;
import org.opensearch.common.Nullable;

public class SuggestItem {

    public enum Kind {
        DOCUMENT("document"), QUERY("query"), USER("user");

        private final String kind;

        Kind(final String kind) {
            this.kind = kind;
        }

        @Override

import org.codelibs.core.misc.DisposableUtil;

/**
 * ログ出力を提供するクラスです。
 *
 * @author higa
 */
public class Logger {

    /**
     * ログの出力レベルです。
     */
    public enum LogLevel {
        /** デバッグ */
        DEBUG,
        /** 情報 */
        INFO,
        /** 警告 */
        WARN,
        /** エラー */
        ERROR,
        /** 致命的 */
        FATAL,
    }

            return ArtifactType.getType(name);
        }

        @Override
        public String toString() {
            return name + ":" + version;
        }
    }

    public enum ArtifactType {
        DATA_STORE("fess-ds"), //
        THEME("fess-theme"), //
        INGEST("fess-ingest"), //
        SCRIPT("fess-script"), //
        WEBAPP("fess-webapp"), //

      List<E> elements = new ArrayList<>();
      Helpers.addAll(elements, previousElements);
      Helpers.addAll(elements, Helpers.reverse(nextElements));
      return elements;
    }
  }

  public enum KnownOrder {
    KNOWN_ORDER,
    UNKNOWN_ORDER
  }

  @SuppressWarnings("unchecked") // TODO(cpovirk): Stop using arrays.
  AbstractIteratorTester(
      int steps,

    outputFuture.addListener(listener, directExecutor());
    taskFuture.addListener(listener, directExecutor());

    return outputFuture;
  }

  enum RunningState {
    NOT_RUN,
    CANCELLED,
    STARTED,
  }

  /**
   * This class helps avoid a StackOverflowError when large numbers of tasks are submitted with

   */
  public static Comparator<int[]> lexicographicalComparator() {
    return LexicographicalComparator.INSTANCE;
  }

  enum LexicographicalComparator implements Comparator<int[]> {
    INSTANCE;

    @Override
    // A call to bare "min" or "max" would resolve to our varargs method, not to any static import.