@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MultimapClearTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(absent = SUPPORTS_REMOVE)
  public void testClearUnsupported() {
    assertThrows(UnsupportedOperationException.class, () -> multimap().clear());
  }

  // Empty multimaps *do* have defined equals semantics.

import java.net.InetAddress;
import java.util.List;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

/**
 * Unit tests for WitnessNotification class.
 */
public class WitnessNotificationTest {

    private WitnessNotification notification;

    @BeforeEach
    void setUp() {
        notification = new WitnessNotification(WitnessEventType.CLIENT_MOVE, "TestResource");

/**
 * Represents the source of a model input, such as a POM file.
 * <p>
 * This class tracks the origin of model elements, including their location in source files
 * and relationships between imported models. It's used for error reporting and debugging
 * to help identify where specific model elements came from.
 *
 * @since 4.0.0
 */
public class InputSource implements Serializable {

    private final String modelId;

## `jsonable_encoder`の使用

JSON互換のデータのみを受信するデータベース`fake_db`があるとしましょう。

例えば、`datetime`オブジェクトはJSONと互換性がないので、このデーターベースには受け取られません。

そのため、`datetime`オブジェクトは<a href="https://en.wikipedia.org/wiki/ISO_8601" class="external-link" target="_blank">ISO形式</a>のデータを含む`str`に変換されなければなりません。

同様に、このデータベースはPydanticモデル（属性を持つオブジェクト）を受け取らず、`dict`だけを受け取ります。

そのために`jsonable_encoder`を使用することができます。

Pydanticモデルのようなオブジェクトを受け取り、JSON互換版を返します:

    color: $white;\n        background-color: $color;\n        border-color: $color;\n      }\n    }\n  }\n}\n",".close {\n  float: right;\n  @include font-size($close-font-size);\n  font-weight: $close-font-weight;\n  line-height: 1;\n  color: $close-color;\n  text-shadow: $close-text-shadow;\n  opacity: .5;\n\n  // Override <a>'s hover style\n  @include hover() {\n    color: $close-color;\n    text-decoration: none;\n  }\n\n  &:not(:disabled):not(.disabled) {\n    @include hover-focus() {\n   ...

   */
  @Throws(UnknownHostException::class)
  fun lookup(hostname: String): List<InetAddress>

  companion object {
    /**
     * A DNS that uses [InetAddress.getAllByName] to ask the underlying operating system to
     * lookup IP addresses. Most custom [Dns] implementations should delegate to this instance.
     */
    @JvmField
    val SYSTEM: Dns = DnsSystem()

    private class DnsSystem : Dns {

/**
 * Listener for connection events. Extend this class to monitor the new connections and closes.
 *
 * All event methods must execute fast, without external locking, cannot throw exceptions,
 * attempt to mutate the event parameters, or be reentrant back into the client.
 * Any IO - writing to files or network should be done asynchronously.
 */
internal abstract class ConnectionListener {
  /**

import jakarta.validation.constraints.Size;

/**
 * Form class for editing label types in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing label type entries,
 * including tracking information for optimistic locking and audit trails.
 * Label types are used to categorize and filter documents in search results.
 *
 */
public class EditForm extends CreateForm {

    /**

import jakarta.validation.constraints.Size;

/**
 * Form class for editing user roles in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing role entries,
 * including tracking information for optimistic locking and audit trails.
 * Roles define permissions and access levels for users within the system.
 *
 */
public class EditForm extends CreateForm {

    /**

import java.util.NoSuchElementException;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Base class for {@link RangeSet} tests.
 *
 * @author Louis Wasserman
 */
@GwtIncompatible // TreeRangeSet
@NullUnmarked
public abstract class AbstractRangeSetTest extends TestCase {
  public static void testInvariants(RangeSet<?> rangeSet) {
    testInvariantsInternal(rangeSet);