// TODO(lowasser): consider caching small values, like Long.valueOf
    return new UnsignedLong(bits);
  }

  /**
   * Returns an {@code UnsignedLong} representing the same value as the specified {@code long}.
   *
   * @throws IllegalArgumentException if {@code value} is negative
   * @since 14.0
   */
  @CanIgnoreReturnValue
  public static UnsignedLong valueOf(long value) {

        FessSystemException exception1 = new FessSystemException("Test");
        FessSystemException exception2 = new FessSystemException("Test");

        // Both instances should be of the same class
        assertEquals(exception1.getClass(), exception2.getClass());
    }

    public void test_throwAndCatch() {
        // Test throwing and catching the exception

        private final String name;

        public TestScriptEngine() {
            this("testEngine");
        }

        public TestScriptEngine(String name) {
            super();
            this.name = name;
        }

        @Override
        protected String getName() {
            return name;
        }

        @Override

      /*
       * uncheckedCastNullableTToT is safe: The first call to this method always enters the !hasNext() case and
       * populates key, after which it's never cleared.
       */
      return output(uncheckedCastNullableTToT(key), valueIterator.next());
    }

    @Override
    public void remove() {
      valueIterator.remove();
      /*

        : result;
  }

  /**
   * Returns a new range set consisting of the union of this range set and {@code other}.
   *
   * <p>This is essentially the same as {@code TreeRangeSet.create(this).addAll(other)} except it
   * returns an {@code ImmutableRangeSet}.
   *
   * @since 21.0
   */
  public ImmutableRangeSet<C> union(RangeSet<C> other) {

// Note: @Test annotations are deliberate, as some subclasses specify @RunWith(JUnit4).
@GwtIncompatible
@J2ktIncompatible
@J2ObjCIncompatible // com.google.common.reflect.ClassPath
public abstract class AbstractPackageSanityTests extends TestCase {

  /**
   * A predicate that matches classes with an underscore in the class name. This can be used with

 * second invocation, so implementors have made various choices, including:
 *
 * <ul>
 *   <li>returning the same iterator again
 *   <li>throwing an exception of some kind
 *   <li>or the usual, <i>robust</i> behavior, which all known {@link Collection} implementations
 *       have, of returning a new, independent iterator
 * </ul>
 *

  // TODO(cpovirk): enable when ready (apparently after a change to our GWT emulation)
  public void xtestInitialCapacity_setTwice() {
    MapMaker maker = new MapMaker().initialCapacity(16);
    try {
      // even to the same value is not allowed
      maker.initialCapacity(16);
      fail();
    } catch (IllegalStateException expected) {
    }
  }

  public void testReturnsPlainConcurrentHashMapWhenPossible() {

//
// The above means that any added/deleted fields are incompatible.
//
//msgp:tuple FileInfoVersions
type FileInfoVersions struct {
	// Name of the volume.
	Volume string `msg:"v,omitempty"`

	// Name of the file.
	Name string `msg:"n,omitempty"`

	// Represents the latest mod time of the
	// latest version.
	LatestModTime time.Time `msg:"lm"`

	Versions     []FileInfo `msg:"vs"`

      run = true;
    }
  }

  private static class TestCallable implements Callable<String> {
    @Override
    public String call() {
      return "foo";
    }
  }

  /** Simple same thread listening executor service that doesn't handle shutdown. */
  private static class TestListeningExecutorService extends AbstractListeningExecutorService {

    @Override
    public void execute(Runnable runnable) {