public String getRemoteFilename() {
        return "maven-metadata.xml";
    }

    @Override
    public String getLocalFilename(ArtifactRepository repository) {
        return "maven-metadata-" + repository.getKey() + ".xml";
    }

    @Override
    public void storeInLocalRepository(ArtifactRepository localRepository, ArtifactRepository remoteRepository)
            throws RepositoryMetadataStoreException {
        try {

            }).forEach(e -> {
                if (logger.isDebugEnabled()) {
                    logger.debug("system.properties: setProperty({}, {})", e.getKey(), e.getValue());
                }
                System.setProperty(e.getKey(), e.getValue());
            });
        }
    }

    /**
     * Updates the application configuration.
     *

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.Multimap;

/**
 * Helper methods/assertions for use with {@code com.google.common.collect} types.
 *
 * @author Colin Decker
 */
@GwtCompatible
final class GoogleHelpers {

  private GoogleHelpers() {}

  static void assertEmpty(Multimap<?, ?> multimap) {
    if (!multimap.isEmpty()) {

      assertThat(entryOne.getKey()).isEqualTo(keyOne);
      assertEquals(hashOne, entryOne.getHash());
      assertThat(entryOne.getNext()).isNull();
      assertThat(copyOne.getValue()).isEqualTo(valueOne);

      InternalEntry<Object, Object, ?> copyTwo = segment.copyForTesting(entryTwo, copyOne);
      assertThat(copyTwo.getKey()).isEqualTo(keyTwo);
      assertEquals(hashTwo, copyTwo.getHash());

      assertThat(entryOne.getKey()).isEqualTo(keyOne);
      assertEquals(hashOne, entryOne.getHash());
      assertThat(entryOne.getNext()).isNull();
      assertThat(copyOne.getValue()).isEqualTo(valueOne);

      InternalEntry<Object, Object, ?> copyTwo = segment.copyForTesting(entryTwo, copyOne);
      assertThat(copyTwo.getKey()).isEqualTo(keyTwo);
      assertEquals(hashTwo, copyTwo.getHash());

    /**
     * Adds an entry to the built multimap.
     *
     * @since 11.0
     */
    @CanIgnoreReturnValue
    public Builder<K, V> put(Entry<? extends K, ? extends V> entry) {
      return put(entry.getKey(), entry.getValue());
    }

    /**
     * Adds entries to the built multimap.
     *
     * @since 19.0
     */
    @CanIgnoreReturnValue

import com.google.common.annotations.J2ktIncompatible;

/**
 * Modes for opening a file for writing. The default when mode when none is specified is to truncate
 * the file before writing.
 *
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
public enum FileWriteMode {
  /** Specifies that writes to the opened file should append to the end of the file. */
  APPEND

  public void testPutDuplicateValue() {
    List<Entry<K, V>> entries = copyToList(multimap().entries());

    for (Entry<K, V> entry : entries) {
      resetContainer();

      K k = entry.getKey();
      V v = entry.getValue();

      List<V> values = multimap().get(k);
      List<V> expectedValues = copyToList(values);

      assertTrue(multimap().put(k, v));
      expectedValues.add(v);

import com.google.errorprone.annotations.Immutable;
import java.io.Serializable;
import java.util.zip.Checksum;

/**
 * {@link HashFunction} adapter for {@link Checksum} instances.
 *
 * @author Colin Decker
 */
@Immutable
final class ChecksumHashFunction extends AbstractHashFunction implements Serializable {
  private final ImmutableSupplier<? extends Checksum> checksumSupplier;
  private final int bits;

Ich finde, `Union[SomeType, None]` ist expliziter in dem, was es bedeutet.

Es geht nur um Wörter und Namen. Aber diese Wörter können beeinflussen, wie Sie und Ihr Team über den Code denken.

Als Beispiel nehmen wir diese Funktion:

```python
from typing import Optional


def say_hi(name: Optional[str]):
    print(f"Hey {name}!")
```