* given object is also a {@code MapDifference} and the values returned by the {@link
   * #entriesOnlyOnLeft()}, {@link #entriesOnlyOnRight()}, {@link #entriesInCommon()} and {@link
   * #entriesDiffering()} of the two instances are equal.
   */
  @Override
  boolean equals(@CheckForNull Object object);

  /**

import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Basic implementation of {@code Multiset<E>} backed by an instance of {@code
 * ObjectCountHashMap<E>}.
 *
 * <p>For serialization to work, the subclass must specify explicit {@code readObject} and {@code
 * writeObject} methods.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault

     * @param foreignImports The packages/types to import from foreign realms, may be {@code null}.
     * @param artifacts The artifacts to add to the class realm, may be {@code null}. Unresolved artifacts (i.e. with a
     *            missing file) will automatically be excluded from the realm.
     * @return The new plugin realm, never {@code null}.
     */
    ClassRealm createPluginRealm(
            Plugin plugin,

     */
    Map<String, String> getUserProperties();

    /**
     * Gets the base directory of the current project (if any).
     *
     * @return The base directory of the current project or {@code null} if none.
     */
    File getProjectDirectory();

    /**
     * Gets current calculated project properties
     *
     * @return The project properties, never {@code null}.
     */

        super(message, cause);
    }

    /**
     * Constructs a new {@code AbstractMojoExecutionException} exception wrapping an underlying {@code Throwable}.
     *
     * @param cause the cause which is saved for later retrieval by the {@link #getCause()} method.
     *              A {@code null} value is permitted, and indicates that the cause is nonexistent or unknown.
     * @since 3.8.3
     */

   * This is primarily useful in a finally block, where a thrown exception needs to be logged but
   * not propagated (otherwise the original exception will be lost).
   *
   * <p>If {@code swallowIOException} is true then we never throw {@code IOException} but merely log
   * it.
   *
   * <p>Example:
   *
   * <pre>{@code

/**
 * Unit test for {@link Ascii}.
 *
 * @author Craig Berry
 */
@GwtCompatible
public class AsciiTest extends TestCase {

  /**
   * The Unicode points {@code 00c1} and {@code 00e1} are the upper- and lowercase forms of
   * A-with-acute-accent, {@code Á} and {@code á}.
   */
  private static final String IGNORED = "`10-=~!@#$%^&*()_+[]\\{}|;':\",./<>?'\u00c1\u00e1\n";

  private static final String LOWER = "abcdefghijklmnopqrstuvwxyz";

   *
   * <p>This implementation returns {@code true} if {@code object} is a multiset of the same size
   * and if, for each element, the two multisets have the same count.
   */
  @Override
  public final boolean equals(@CheckForNull Object object) {
    return Multisets.equalsImpl(this, object);
  }

  /**
   * {@inheritDoc}
   *
   * <p>This implementation returns the hash code of {@link Multiset#entrySet()}.
   */

     * <blockquote>
     */
    public static void registerSmbURLHandler () {
        SingletonContext.registerSmbURLHandler();
    }


    /**
     * Retrieve an <code>int</code>. If the key does not exist or
     * cannot be converted to an <code>int</code>, the provided default
     * argument will be returned.
     */
    public static int getInt ( Properties props, String key, int def ) {
        String s = props.getProperty(key);

     * @param oldValue the expected data currently associated with the key, may be {@code null}
     * @param newValue the data to associate with the key, may be {@code null} to remove the mapping
     * @return {@code true} if the key mapping was successfully updated from the old value to the new value,