@Override
        public @Nullable DummyInternalEntry getEntry() {
          return null;
        }

        @Override
        public void clear() {}

        @Override
        public @Nullable Object get() {
          return null;
        }

        @Override

    public Ints() {
      // elements aren't sorted, to better test SortedSet iteration ordering
      super(1, 0, 2, 3, 4);
    }
  }

  public static <K extends @Nullable Object, V extends @Nullable Object>
      SampleElements<Entry<K, V>> mapEntries(SampleElements<K> keys, SampleElements<V> values) {
    return new SampleElements<>(
        mapEntry(keys.e0(), values.e0()),
        mapEntry(keys.e1(), values.e1()),

 *         .filter(Client::isActiveInLastMonth)
 *         .transform(Object::toString)
 *         .limit(10)
 *         .toList();
 * }
 *
 * The approximate stream equivalent is:
 *
 * {@snippet :
 * List<String> results =
 *     database.getClientList()
 *         .stream()
 *         .filter(Client::isActiveInLastMonth)
 *         .map(Object::toString)
 *         .limit(10)

 *         .filter(Client::isActiveInLastMonth)
 *         .transform(Object::toString)
 *         .limit(10)
 *         .toList();
 * }
 *
 * The approximate stream equivalent is:
 *
 * {@snippet :
 * List<String> results =
 *     database.getClientList()
 *         .stream()
 *         .filter(Client::isActiveInLastMonth)
 *         .map(Object::toString)
 *         .limit(10)
 *         .collect(Collectors.toList());

    Set<Integer> x = set(1, 2);
    Set<String> y = set("3", "4");

    List<Object> exp1 = list((Object) 1, "3");
    List<Object> exp2 = list((Object) 1, "4");
    List<Object> exp3 = list((Object) 2, "3");
    List<Object> exp4 = list((Object) 2, "4");

    assertThat(Sets.<Object>cartesianProduct(x, y))
        .containsExactly(exp1, exp2, exp3, exp4)
        .inOrder();
  }

      this.gen = gen;
    }

    @Override
    public SampleElements<E> samples() {
      return gen.samples();
    }

    @Override
    public Set<E> create(Object... elements) {
      Object[] duplicated = new Object[elements.length * 2];
      for (int i = 0; i < elements.length; i++) {
        duplicated[i] = elements[i];
        duplicated[i + elements.length] = elements[i];
      }

package org.apache.maven.api;

import javax.tools.DocumentationTool;
import javax.tools.JavaFileManager;
import javax.tools.StandardLocation;

import java.io.File;
import java.nio.file.Path;
import java.util.Objects;
import java.util.Optional;
import java.util.StringJoiner;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**

    }

    @Override
    public void acceptAllColumnMap(Entity entity, Map<String, ? extends Object> allColumnMap) {
    }

    @Override
    public Map<String, Object> extractPrimaryKeyMap(Entity entity) {
        return null;
    }

    @Override
    public Map<String, Object> extractAllColumnMap(Entity entity) {
        return null;

    }

    @Override
    public void acceptAllColumnMap(Entity entity, Map<String, ? extends Object> allColumnMap) {
    }

    @Override
    public Map<String, Object> extractPrimaryKeyMap(Entity entity) {
        return null;
    }

    @Override
    public Map<String, Object> extractAllColumnMap(Entity entity) {
        return null;

    }

    @Override
    public void acceptAllColumnMap(Entity entity, Map<String, ? extends Object> allColumnMap) {
    }

    @Override
    public Map<String, Object> extractPrimaryKeyMap(Entity entity) {
        return null;
    }

    @Override
    public Map<String, Object> extractAllColumnMap(Entity entity) {
        return null;