import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Unit tests for {@link Callables}.
 *
 * @author Isaac Shum
 */
@GwtCompatible(emulated = true)
public class CallablesTest extends TestCase {

  @J2ktIncompatible // TODO(b/324550390): Enable
  public void testReturning() throws Exception {
    assertNull(Callables.returning(null).call());

    Object value = new Object();

import java.util.Arrays;

/**
 * {@link HashFunction} adapter for {@link MessageDigest} instances.
 *
 * @author Kevin Bourrillion
 * @author Dimitris Andreou
 */
@Immutable
@ElementTypesAreNonnullByDefault
final class MessageDigestHashFunction extends AbstractHashFunction implements Serializable {

  @SuppressWarnings("Immutable") // cloned before each use
  private final MessageDigest prototype;

  private final int bytes;

{!../../docs_src/python_types/tutorial010.py!}
```

& ⤴️, 🔄, 👆 🤚 🌐 👨‍🎨 🐕‍🦺:

<img src="/img/python-types/image06.png">

## Pydantic 🏷

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> 🐍 🗃 🎭 📊 🔬.

👆 📣 "💠" 💽 🎓 ⏮️ 🔢.

&amp; 🔠 🔢 ✔️ 🆎.

⤴️ 👆 ✍ 👐 👈 🎓 ⏮️ 💲 &amp; ⚫️ 🔜 ✔ 💲, 🗜 👫 ☑ 🆎 (🚥 👈 💼) &amp; 🤝 👆 🎚 ⏮️ 🌐 💽.

 */
package org.codelibs.fess.ingest;

import java.util.Arrays;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class IngestFactory {
    private static final Logger logger = LogManager.getLogger(IngestFactory.class);

    private Ingester[] ingesters = {};

    public synchronized void add(final Ingester ingester) {
        if (logger.isDebugEnabled()) {

import org.codelibs.fess.app.web.api.FessApiAction;
import org.codelibs.fess.exception.InvalidAccessTokenException;

public abstract class FessApiAdminAction extends FessApiAction {

    private static final Logger logger = LogManager.getLogger(FessApiAdminAction.class);

    @Override
    protected boolean isAccessAllowed() {
        try {

import okhttp3.Response;
import org.junit.Test;
import org.junit.runner.RunWith;

/**
 * OkHttp.
 *
 * https://square.github.io/okhttp/
 */
@RunWith(AndroidJUnit4.class)
public class OkHttpClientTest {
  @Test public void get() throws IOException {
    OkHttpClient client = new OkHttpClient();
    Request request = new Request.Builder()
        .url("https://google.com/robots.txt")

import com.google.common.collect.testing.AbstractCollectionTester;
import org.junit.Ignore;

/**
 * Base class for multiset collection tests.
 *
 * @author Jared Levy
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class AbstractMultisetTester<E> extends AbstractCollectionTester<E> {
  protected final Multiset<E> getMultiset() {

 * limitations under the License.
 */

package com.google.common.collect.testing;

import org.checkerframework.checker.nullness.qual.Nullable;
import org.junit.Ignore;

/** Support class added to a suite as part of {@link FeatureSpecificTestSuiteBuilderTest}. */
/*
 * @Ignore affects the Android test runner (and only the Android test runner): It respects JUnit 4
 * annotations even on JUnit 3 tests.
 *

/** Methods factored out so that they can be emulated differently in GWT. */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class Platform {
  static boolean isInstanceOfThrowableClass(
      @CheckForNull Throwable t, Class<? extends Throwable> expectedClass) {
    return expectedClass.isInstance(t);
  }

  static void restoreInterruptIfIsInterruptedException(Throwable t) {

import com.google.common.annotations.GwtCompatible;
import java.util.Set;

/**
 * Thrown when requirements on a tester method or class conflict with each other.
 *
 * @author George van den Driessche
 */
@GwtCompatible
public class ConflictingRequirementsException extends Exception {
  private Set<Feature<?>> conflicts;
  private Object source;

  public ConflictingRequirementsException(