### Install `pydantic-settings`

First, make sure you create your [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install the `pydantic-settings` package:

<div class="termy">

```console
$ pip install pydantic-settings
---> 100%
```

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;

@Deprecated
class MavenArtifactRepositoryTest {
    private static class MavenArtifactRepositorySubclass extends MavenArtifactRepository {
        String id;

        public MavenArtifactRepositorySubclass(String id) {
            this.id = id;
        }

public interface CoreRealm {

    /**
     * Obtain the {@link ClassRealm} used for Maven Core.
     *
     * @return the class realm of core.
     */
    @Nonnull
    ClassRealm getRealm();

    /**
     * Shorthand method to obtain the {@link ClassWorld} used for Maven Core.
     *
     * @return the class world in use.
     */
    @Nonnull
    default ClassWorld getClassWorld() {
        return getRealm().getWorld();
    }

 * {@link #sloppyTearDown()} instead.
 *
 * @author Luiz-Otavio Zorzella
 * @since 10.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class SloppyTearDown implements TearDown {
  private static final Logger logger = Logger.getLogger(SloppyTearDown.class.getName());

  @Override
  public final void tearDown() {
    try {
      sloppyTearDown();
    } catch (Throwable t) {

import org.junit.Test
import org.junit.runner.RunWith

/**
 * Apache HttpClient 5.x.
 *
 * https://hc.apache.org/httpcomponents-client-5.0.x/index.html
 */
@RunWith(AndroidJUnit4::class)
class ApacheHttpClientTest {
  private var httpClient = HttpClients.createDefault()

  @After fun tearDown() {
    httpClient.close()
  }

  @Test fun get() {

import java.io.IOException;
import java.util.Date;
import okhttp3.Headers;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public final class CurrentDateHeader {
  private final OkHttpClient client = new OkHttpClient.Builder()
      .addInterceptor(new CurrentDateInterceptor())
      .build();

  public void run() throws Exception {

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author shinsuke
 *
 */
public class SitemapsRule extends RegexRule {
    /**
     *
     */
    private static final long serialVersionUID = 1L;

    private static final Logger logger = LoggerFactory.getLogger(SitemapsRule.class);

    @Override
    public boolean match(final ResponseData responseData) {
        if (super.match(responseData)) {

        </ul>
    </div>
    <div id="left">
        <h2>Menu 1</h2>
        <ul class="test">
            <li><a href="javascript:void(0)" onclick="openPage('menu-1-1.html')">Menu 1-1</a></li>
            <li><a href="javascript:void(0)" onclick="openPage('menu-1-2.html')">Menu 1-2</a></li>
        </ul>
        <h2>Menu 2</h2>
        <ul class="test">

    TestHasher hasher = new TestHasher();
    assertThrows(IndexOutOfBoundsException.class, () -> hasher.putBytes(new byte[8], -1, 4));
    assertThrows(IndexOutOfBoundsException.class, () -> hasher.putBytes(new byte[8], 0, 16));
    assertThrows(IndexOutOfBoundsException.class, () -> hasher.putBytes(new byte[8], 0, -1));
  }

  private class TestHasher extends AbstractByteHasher {

   * {@link Predicate#apply}. Do not provide a predicate such as {@code
   * Predicates.instanceOf(ArrayList.class)}, which is inconsistent with equals. (See {@link
   * Iterables#filter(Iterable, Class)} for related functionality.)
   *
   * <p><b>{@code Stream} equivalent:</b> {@link java.util.stream.Stream#filter Stream.filter}.
   */