/** Character used to separate cache key components */
    protected static final char CACHE_KEY_SPLITTER = '\n';

    /** Cache for storing popular word lists */
    protected Cache<String, List<String>> cache;

    /** Fess configuration instance */
    protected FessConfig fessConfig;

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

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import org.jspecify.annotations.NullMarked;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import org.jspecify.annotations.NullMarked;

    return Maps.immutableEntry(key, value);
  }

  public static class Builder<K, V> {
    final List<Entry<K, V>> entries;
    @Nullable Comparator<? super V> valueComparator;

    public Builder() {
      this.entries = Lists.newArrayList();
    }

    Builder(int initCapacity) {
      this.entries = Lists.newArrayListWithCapacity(initCapacity);
    }

    @CanIgnoreReturnValue

<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
  <ShortName>Fess</ShortName>
  <Description>Full Text Search for Your Documents.</Description>
  <Tags>Full Text Search</Tags>
  <Contact>fess-user@lists.sourceforge.jp</Contact>
  <SearchForm>http://localhost:8080/fess/</SearchForm>
  <Url type="text/html" template="http://localhost:8080/fess/search?q={searchTerms}"/>
  <InputEncoding>UTF-8</InputEncoding>

    return ImmutableSet.copyOf(elements);
  }

  public void testCreation_allDuplicates() {
    ImmutableSet<String> set = ImmutableSet.copyOf(Lists.newArrayList("a", "a"));
    assertTrue(set instanceof SingletonImmutableSet);
    assertEquals(Lists.newArrayList("a"), new ArrayList<>(set));
  }

  public void testCreation_oneDuplicate() {
    // now we'll get the varargs overload

    return ImmutableSet.copyOf(elements);
  }

  public void testCreation_allDuplicates() {
    ImmutableSet<String> set = ImmutableSet.copyOf(Lists.newArrayList("a", "a"));
    assertTrue(set instanceof SingletonImmutableSet);
    assertEquals(Lists.newArrayList("a"), new ArrayList<>(set));
  }

  public void testCreation_oneDuplicate() {
    // now we'll get the varargs overload

      args.add(generateDummyArg(param, generator));
    }
    Object instance = createInstance(factory, args);
    List<Object> equalArgs = generateEqualFactoryArguments(factory, params, args);
    // Each group is a List of items, each item has a list of factory args.
    List<List<List<Object>>> argGroups = new ArrayList<>();
    argGroups.add(ImmutableList.of(args, equalArgs));
    EqualsTester tester =

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.primitives.Longs;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.SerializableTester;
import java.util.Iterator;
import java.util.List;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for {@link Converter}. */

  /** Features supported by lists where only removal is allowed. */
  REMOVE_OPERATIONS(CollectionFeature.REMOVE_OPERATIONS, SUPPORTS_REMOVE_WITH_INDEX);

  private final Set<Feature<? super List>> implied;

  ListFeature(Feature<? super List>... implied) {
    this.implied = copyToSet(implied);
  }

  @Override
  public Set<Feature<? super List>> getImpliedFeatures() {
    return implied;
  }