import org.jspecify.annotations.NullUnmarked;

/**
 * Class that contains nested abstract tests for filtered collection views, along with their
 * implementation helpers.
 *
 * @author Louis Wasserman
 */
/*
 * TODO(cpovirk): Should all the tests for filtered collections run under GWT, too? Currently, they
 * don't.
 */
@NullUnmarked
public final class FilteredCollectionsTestUtil {

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

Notice that this means "`one_person` is an **instance** of the class `Person`".

It doesn't mean "`one_person` is the **class** called `Person`".

## Pydantic models { #pydantic-models }

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> is a Python library to perform data validation.

import org.codelibs.core.io.ResourceBundleUtil;
import org.codelibs.core.misc.DisposableUtil;
import org.codelibs.core.misc.LocaleUtil;

/**
 * Class for assembling messages from message codes and arguments.
 *
 * @author higa
 */
public abstract class MessageFormatter {

    /**
     * Do not instantiate.
     */
    protected MessageFormatter() {
    }

import org.codelibs.core.exception.SQLRuntimeException;
import org.codelibs.core.log.Logger;

/**
 * Utility class for {@link Statement}.
 *
 * @author higa
 */
public abstract class StatementUtil {

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

    /**
     * Do not instantiate.
     */
    protected StatementUtil() {
    }

    /**

/**
 * Abstract base class for Fess API actions that provides common functionality
 * for API endpoints including authentication, message handling, and access control.
 *
 * This class extends FessBaseAction and provides specialized behavior for API requests,
 * including token-based authentication and JSON response handling.
 */
public abstract class FessApiAction extends FessBaseAction {

    /**

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

class SmbComNtTransactionResponseTest {

    private TestableSmbComNtTransactionResponse response;

    // A concrete implementation of the abstract class for testing purposes.
    private static class TestableSmbComNtTransactionResponse extends SmbComNtTransactionResponse {
        @Override

import org.jspecify.annotations.Nullable;

/**
 * Benchmarks to compare performance of MinMaxPriorityQueue and PriorityQueue.
 *
 * @author Sverre Sundsdal
 */
@NullUnmarked
public class MinMaxPriorityQueueBenchmark {
  @Param private ComparatorType comparator;

  // TODO(kevinb): add 1000000 back when we have the ability to throw
  // NotApplicableException in the expensive comparator case.

    private final List<MyToken> synonyms;

    private final CharTermAttribute termAttr = addAttribute(CharTermAttribute.class);

    private final OffsetAttribute offsetAttr = addAttribute(OffsetAttribute.class);

    private final PositionIncrementAttribute posIncAttr = addAttribute(PositionIncrementAttribute.class);

    protected NGramSynonymTokenizer(final int n, final String delimiters, final boolean expand, final boolean ignoreCase,

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.convert;

import java.math.BigInteger;

/**
 * Utility class for conversions related to {@link BigInteger}.
 *
 * @author higa
 */
public abstract class BigIntegerConversionUtil {

    /**
     * Do not instantiate.
     */
    protected BigIntegerConversionUtil() {
    }

    /**

import org.codelibs.fess.opensearch.log.exbhv.UserInfoBhv;

import jakarta.annotation.Resource;

/**
 * Service class for managing user information data.
 * This service provides operations for maintaining and cleaning up user information records.
 */
public class UserInfoService {

    @Resource
    private UserInfoBhv userInfoBhv;

    @Resource
    private SystemHelper systemHelper;

    /**