? Collections.emptySet()
                    : Collections.unmodifiableSet(new HashSet<>(scopesToCollect));
            resolve = scopesToResolve == null
                    ? Collections.emptySet()
                    : Collections.unmodifiableSet(new HashSet<>(scopesToResolve));
            this.aggregating = aggregating;

            int hash = 17;

import com.google.common.collect.testing.features.Feature;
import com.google.common.testing.SerializableTester;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import junit.framework.TestSuite;

/**
 * Concrete instantiation of {@link AbstractCollectionTestSuiteBuilder} for testing collections that

    protected Suggester suggester;

    protected FessConfig fessConfig;

    protected final Set<String> contentFieldNameSet = new HashSet<>();

    protected final Set<String> tagFieldNameSet = new HashSet<>();

    protected final Set<String> roleFieldNameSet = new HashSet<>();

    protected List<String> contentFieldList;

    protected PopularWordHelper popularWordHelper = null;

 * under the License.
 */
package org.apache.maven.internal.impl.resolver.type;

import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.apache.maven.api.JavaPathType;
import org.apache.maven.api.Language;
import org.apache.maven.api.PathType;
import org.apache.maven.api.Type;

 * under the License.
 */
package org.apache.maven.repository.metadata;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.factory.ArtifactFactory;
import org.apache.maven.artifact.repository.ArtifactRepository;

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.extension.internal;

import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.codehaus.plexus.classworlds.realm.ClassRealm;

import static java.util.function.Function.identity;
import static java.util.stream.Collectors.collectingAndThen;

import com.google.common.collect.testing.features.CollectionSize;
import java.io.Serializable;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@code Synchronized#set}.
 *

 * under the License.
 */
package org.apache.maven.lifecycle.internal;

import javax.inject.Inject;

import java.io.File;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Properties;
import java.util.Set;

import org.apache.maven.AbstractCoreMavenComponentTestCase;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.execution.MavenSession;

            Collection<String> packages,
            String key,
            XmlNode configuration) {
        this.realm = realm;
        this.artifacts = Collections.unmodifiableSet(new HashSet<>(artifacts));
        this.packages = Collections.unmodifiableSet(new HashSet<>(packages));
        this.key = key;
        this.configuration = configuration;
    }

    /**
     * Returns ClassLoader used to load extension classes.
     */

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.project;

import java.nio.file.Path;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.maven.api.model.Model;

/**