import com.google.common.util.concurrent.UncheckedExecutionException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Unit test for {@link AbstractLoadingCache}.
 *
 * @author Charles Fry
 */
public class AbstractLoadingCacheTest extends TestCase {

  public void testGetUnchecked_checked() {

import java.util.Collection;
import java.util.List;
import java.util.SortedSet;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@code ForwardingSortedSet}.
 *
 * @author Louis Wasserman
 */
public class ForwardingSortedSetTest extends TestCase {

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A {@code Multimap} that can hold duplicate key-value pairs and that maintains the insertion
 * ordering of values for a given key. See the {@link Multimap} documentation for information common

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.Deque;
import java.util.Iterator;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A deque which forwards all its method calls to another deque. Subclasses should override one or
 * more methods to modify the behavior of the backing deque as desired per the <a

 * the License.
 */

package com.google.common.base;

import com.google.common.annotations.GwtCompatible;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Legacy version of {@link java.util.function.Predicate java.util.function.Predicate}. Determines a
 * true or false value for a given input.
 *

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * An executor service which forwards all its method calls to another executor service. Subclasses
 * should override one or more methods to modify the behavior of the backing executor service as

	start := time.Now()
	plaintext, err := k.conn.Decrypt(ctx, req)
	k.updateMetrics(err, time.Since(start))

	return plaintext, err
}

// MAC generates the checksum of the given req.Message using the key
// with the req.Name at the KMS.
func (k *KMS) MAC(ctx context.Context, req *MACRequest) ([]byte, error) {
	if req.Name == "" {
		req.Name = k.DefaultKey
	}

In your editor, inside your function you will get type hints and completion everywhere (this wouldn't happen if you received a `dict` instead of a Pydantic model):

<img src="/img/tutorial/body/image03.png">

You also get error checks for incorrect type operations:

<img src="/img/tutorial/body/image04.png">

This is not by chance, the whole framework was built around that design.

import com.google.common.testing.EqualsTester;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@link Subscriber}.
 *
 * @author Cliff Biffle
 * @author Colin Decker
 */
public class SubscriberTest extends TestCase {

import java.util.Collection;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@code ForwardingSet}.
 *
 * @author Robert Konigsberg
 * @author Louis Wasserman
 */
public class ForwardingSetTest extends TestCase {