import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.lang.reflect.Field;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import java.util.WeakHashMap;
import org.jspecify.annotations.Nullable;

/**
 * Utility methods for working with {@link Enum} instances.
 *
 * @author Steve McKay
 * @since 9.0
 */
@GwtIncompatible
@J2ktIncompatible

     * Creates and returns a new instance of {@link WeakHashMap}.
     *
     * @param <K> the key type of {@link WeakHashMap}
     * @param <V> the value type of {@link WeakHashMap}
     * @return a new instance of {@link WeakHashMap}
     * @see WeakHashMap#WeakHashMap()
     */
    public static <K, V> WeakHashMap<K, V> newWeakHashMap() {
        return new WeakHashMap<>();
    }

    /**

     *
     * @param <KEY> the key type of the <code>Map</code>
     * @param <VALUE> the value type of the <code>Map</code>
     * @param key the key to be added to the <code>Map</code>
     * @param value the value to be added to the <code>Map</code>
     * @return a {@literal Maps} for constructing a {@link WeakHashMap} with the specified key and value
     */

 * be quickly garbage-collected before they are ever accessed.
 *
 * <p>{@code new MapMaker().weakKeys().makeMap()} is a recommended replacement for {@link
 * java.util.WeakHashMap}, but note that it compares keys using object identity whereas {@code
 * WeakHashMap} uses {@link Object#equals}.
 *
 * @author Bob Lee
 * @author Charles Fry
 * @author Kevin Bourrillion
 * @since 2.0
 */
@J2ktIncompatible
@GwtCompatible