//                                                                           =========
    private static final UserInfoDbm _instance = new UserInfoDbm();

    private UserInfoDbm() {
    }

    public static UserInfoDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

    //                                                                           =========
    private static final CrawlingInfoParamDbm _instance = new CrawlingInfoParamDbm();

    private CrawlingInfoParamDbm() {
    }

    public static CrawlingInfoParamDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

   * @throws NullPointerException if any key or value in {@code map} is null
   * @throws ClassCastException if any value is not an instance of the type specified by its key
   */
  public static <B, S extends B> ImmutableClassToInstanceMap<B> copyOf(
      Map<? extends Class<? extends S>, ? extends S> map) {
    if (map instanceof ImmutableClassToInstanceMap) {
      @SuppressWarnings("rawtypes") // JDT-based J2KT Java frontend does not permit the direct cast

  }

  public static final class NullsBeforeB extends NullsBefore {
    public static final NullsBeforeB INSTANCE = new NullsBeforeB();

    private NullsBeforeB() {
      super("b");
    }
  }

  public static final class NullsBeforeTwo extends NullsBefore {
    public static final NullsBeforeTwo INSTANCE = new NullsBeforeTwo();

    private NullsBeforeTwo() {

     * @return float representation of the value, or 0.0f if conversion fails
     */
    protected float toFloat(final Object value) {
        if (value instanceof final Float f) {
            return f;
        }
        if (value instanceof final String s) {
            return Float.parseFloat(s);
        }
        return 0.0f;
    }

    /**

        try {
            if (value instanceof String) {
                if ("Subject".equals(key)) {
                    data.putValue(key, getDecodeText(value.toString()));
                } else {
                    data.putValue(key, value.toString());
                }
            } else if (value instanceof String[]) {
                data.putValues(key, (String[]) value);

import java.util.concurrent.TimeUnit;
import org.jspecify.annotations.Nullable;

/**
 * A {@link ScheduledExecutorService} that returns {@link ListenableFuture} instances from its
 * {@code ExecutorService} methods. To create an instance from an existing {@link
 * ScheduledExecutorService}, call {@link
 * MoreExecutors#listeningDecorator(ScheduledExecutorService)}.
 *
 * @author Chris Povirk
 * @since 10.0
 */

   *
   * @throws NullPointerException if any key or value in {@code map} is null
   */
  public static <K, V> ImmutableMap<K, V> copyOf(Map<? extends K, ? extends V> map) {
    if ((map instanceof ImmutableMap) && !(map instanceof SortedMap)) {
      @SuppressWarnings("unchecked") // safe since map is not writable
      ImmutableMap<K, V> kvMap = (ImmutableMap<K, V>) map;
      if (!kvMap.isPartialView()) {
        return kvMap;

import java.util.Objects;
import java.util.Queue;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * Static utility methods for {@link Graph}, {@link ValueGraph}, and {@link Network} instances.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 * @since 20.0
 */
@Beta
public final class Graphs extends GraphsBridgeMethods {

  private Graphs() {}

  // Graph query methods

import java.util.Optional;
import java.util.Queue;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * Static utility methods for {@link Graph}, {@link ValueGraph}, and {@link Network} instances.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 * @since 20.0
 */
@Beta
public final class Graphs extends GraphsBridgeMethods {

  private Graphs() {}

  // Graph query methods