```Python
say_hi(name=None)  # Esto funciona, None es válido 🎉
```

La buena noticia es que, una vez que estés en Python 3.10, no tendrás que preocuparte por eso, ya que podrás simplemente usar `|` para definir uniones de tipos:

{* ../../docs_src/python_types/tutorial009c_py310.py hl[1,4] *}

Y entonces no tendrás que preocuparte por nombres como `Optional` y `Union`. 😎

#### Tipos genéricos

 * <p>TODO: make CollectionTestSuiteBuilder test reserialized collections
 *
 * @author Jesse Wilson
 */
@GwtIncompatible
public class ReserializingTestSetGenerator<E> extends ReserializingTestCollectionGenerator<E>
    implements TestSetGenerator<E> {

  ReserializingTestSetGenerator(TestSetGenerator<E> delegate) {
    super(delegate);
  }

  public static <E> TestSetGenerator<E> newInstance(TestSetGenerator<E> delegate) {

/**
 * A generator using sample elements whose hash codes all collide badly.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
@NullMarked
public abstract class TestCollidingSetGenerator implements TestSetGenerator<Object> {
  @Override
  public SampleElements<Object> samples() {
    return new Colliders();
  }

  @Override
  public Object[] createArray(int length) {
    return new Object[length];
  }

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs;

import java.util.Iterator;

/**
 * An iterator that implements AutoCloseable to allow resource cleanup.
 * This interface combines Iterator functionality with automatic resource management.
 *
 * @param <T> the type of elements returned by this iterator
 * @author mbechler
 */

import org.apache.http.protocol.HttpContext;

/**
 * This class is AuthSchemeFactory implementation for NTLM.
 *
 * @author shinsuke
 *
 */
public class NTLMSchemeProvider implements AuthSchemeProvider {

    /**
     * Creates a new NTLMSchemeProvider instance.
     */
    public NTLMSchemeProvider() {
        super();
    }

    /**
     * Creates a new NTLMScheme instance.

/**
 * An abstract base class for transformers.
 * Provides basic implementation for managing the transformer's name.
 *
 */
public abstract class AbstractTransformer implements Transformer {

    /**
     * Creates a new instance of AbstractTransformer.
     */
    public AbstractTransformer() {
        // NOP
    }

    /**
     * The name of the transformer.
     */

     */
    public void setMonitorInterval(final int monitorInterval) {
        this.monitorInterval = monitorInterval;
    }

    /**
     * Inner class that implements TimeoutTarget for monitoring job execution.
     */
    static class MonitorTarget implements TimeoutTarget {

        /** The job log being monitored */
        private final JobLog jobLog;

        /**
         * Constructor for MonitorTarget.

Interceptors
============

Interceptors are a powerful mechanism that can monitor, rewrite, and retry calls. Here's a simple interceptor that logs the outgoing request and the incoming response.

```java
class LoggingInterceptor implements Interceptor {
  @Override public Response intercept(Interceptor.Chain chain) throws IOException {
    Request request = chain.request();

    long t1 = System.nanoTime();

 */
@GwtCompatible
@J2ktIncompatible
@SuppressWarnings("EnumOrdinal") // This is one of the low-level utilities where it's suitable.
public final class EnumMultiset<E extends Enum<E>> extends AbstractMultiset<E>
    implements Serializable {
  /** Creates an empty {@code EnumMultiset}. */
  public static <E extends Enum<E>> EnumMultiset<E> create(Class<E> type) {
    return new EnumMultiset<>(type);
  }

  /**

import org.jspecify.annotations.NullUnmarked;

/**
 * A char source for testing that has configurable options.
 *
 * @author Colin Decker
 */
@NullUnmarked
public class TestCharSource extends CharSource implements TestStreamSupplier {

  private final TestByteSource byteSource;

  public TestCharSource(String content, TestOption... options) {
    this.byteSource = new TestByteSource(content.getBytes(UTF_8), options);
  }