}
	method := mwq.Method.Copy(fn, skip)
	var quals AST
	if mwq.Qualifiers != nil {
		quals = mwq.Qualifiers.Copy(fn, skip)
	}
	if method == nil && quals == nil {
		return fn(mwq)
	}
	if method == nil {
		method = mwq.Method
	}
	if quals == nil {
		quals = mwq.Qualifiers
	}
	mwq = &MethodWithQualifiers{Method: method, Qualifiers: quals, RefQualifier: mwq.RefQualifier}
	if r := fn(mwq); r != nil {

    return ordering.<@NonNull S>nullsLast();
  }

  @Override
  public boolean equals(@CheckForNull Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof NullsFirstOrdering) {
      NullsFirstOrdering<?> that = (NullsFirstOrdering<?>) object;
      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {

    return (Ordering<@Nullable S>) this;
  }

  @Override
  public boolean equals(@CheckForNull Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof NullsLastOrdering) {
      NullsLastOrdering<?> that = (NullsLastOrdering<?>) object;
      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {

    return (Ordering<@Nullable S>) this;
  }

  @Override
  public boolean equals(@CheckForNull Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof NullsLastOrdering) {
      NullsLastOrdering<?> that = (NullsLastOrdering<?>) object;
      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {

    assertFalse(control("foo", 1).equals(entry("foo", 2)));
    assertFalse(entry("foo", 1).equals(control("bar", 1)));
    assertFalse(entry("foo", 1).equals(new Object()));
    assertFalse(entry("foo", 1).equals(null));
  }

  public void testEqualsNull() {
    assertEquals(control(NE, 1), entry(NE, 1));
    assertFalse(control(NE, 1).equals(entry(NE, 2)));
    assertFalse(entry(NE, 1).equals(control("bar", 1)));

  }

  private MinimalSet(Class<? super @NonNull E> type, E... contents) {
    super(type, true, contents);
  }

  /*
   * equals() and hashCode() are more specific in the Set contract.
   */

  @Override
  public boolean equals(@Nullable Object object) {
    if (object instanceof Set) {
      Set<?> that = (Set<?>) object;
      return (this.size() == that.size()) && this.containsAll(that);
    }

  }

  private MinimalSet(Class<? super @NonNull E> type, E... contents) {
    super(type, true, contents);
  }

  /*
   * equals() and hashCode() are more specific in the Set contract.
   */

  @Override
  public boolean equals(@Nullable Object object) {
    if (object instanceof Set) {
      Set<?> that = (Set<?>) object;
      return (this.size() == that.size()) && this.containsAll(that);
    }

  }

  @Override
  public boolean equals(@CheckForNull Object obj) {
    if (obj == this) {
      return true;
    }
    if (obj instanceof FunctionalEquivalence) {
      FunctionalEquivalence<?, ?> that = (FunctionalEquivalence<?, ?>) obj;
      return function.equals(that.function) && resultEquivalence.equals(that.resultEquivalence);
    }
    return false;
  }

  @Override

  }

  @Override
  public boolean equals(@CheckForNull Object obj) {
    if (obj == this) {
      return true;
    }
    if (obj instanceof FunctionalEquivalence) {
      FunctionalEquivalence<?, ?> that = (FunctionalEquivalence<?, ?>) obj;
      return function.equals(that.function) && resultEquivalence.equals(that.resultEquivalence);
    }
    return false;
  }

  @Override

    return ordering.<@NonNull S>nullsLast();
  }

  @Override
  public boolean equals(@CheckForNull Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof NullsFirstOrdering) {
      NullsFirstOrdering<?> that = (NullsFirstOrdering<?>) object;
      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {