assertFalse(isPositive.apply(0));
        assertFalse(isPositive.apply(-1));
        assertFalse(isPositive.apply(null));
    }

    public void test_apply_object() {
        BooleanFunction<Object> isNotNull = obj -> obj != null;

        assertTrue(isNotNull.apply("test"));
        assertTrue(isNotNull.apply(123));
        assertTrue(isNotNull.apply(new Object()));
        assertFalse(isNotNull.apply(null));
    }

    // needed for serialization
    AbstractCell() {}

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj == this) {
        return true;
      }
      if (obj instanceof Cell) {
        Cell<?, ?, ?> other = (Cell<?, ?, ?>) obj;
        return Objects.equals(getRowKey(), other.getRowKey())
            && Objects.equals(getColumnKey(), other.getColumnKey())

                && (service == null || service.startsWith("??") || this.service.equalsIgnoreCase(service));
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj instanceof final SmbTree tree) {
            return matches(tree.share, tree.service);
        }
        return false;
    }

    extends java.util.function.Function<F, T> {
  @Override
  @ParametricNullness
  T apply(@ParametricNullness F input);

  /**
   * <i>May</i> return {@code true} if {@code obj} is a {@code Function} that behaves identically to
   * this function.
   *
   * <p><b>Warning: do not depend</b> on the behavior of this method.
   *

            return value;
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj)
                return true;
            if (obj == null || getClass() != obj.getClass())
                return false;
            CustomTestObject other = (CustomTestObject) obj;
            return value == other.value && (name != null ? name.equals(other.name) : other.name == null);
        }

    final int value;

    Collider(int value) {
      this.value = value;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      return obj instanceof Collider && ((Collider) obj).value == value;
    }

    @Override
    public int hashCode() {
      return 1; // evil!
    }
  }

                    final Object obj = source.get(s);
                    if (obj instanceof Date) {
                        return false;
                    }
                    return !validateDateTimeString(source.get(s));
                }).collect(Collectors.toList()));
    }

    default boolean validateDateTimeString(final Object obj) {

            result += this.scope.hashCode();
        }
        return result;
    }

    @Override
    public boolean equals(final Object obj) {
        Name n;

        if (!(obj instanceof Name)) {
            return false;
        }
        n = (Name) obj;
        if (this.scope == null && n.scope == null) {
            return this.name.equals(n.name) && this.hexCode == n.hexCode;
        }

    private ClassificationMeta invokeMethod(Object obj, String methodName, String param) {
        try {
            java.lang.reflect.Method method = obj.getClass().getDeclaredMethod(methodName, String.class);
            method.setAccessible(true);
            return (ClassificationMeta) method.invoke(obj, param);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

  public final int hashCode() {
    return (31 + method.hashCode()) * 31 + System.identityHashCode(target);
  }

  @Override
  public final boolean equals(@Nullable Object obj) {
    if (obj instanceof Subscriber) {
      Subscriber that = (Subscriber) obj;
      // Use == so that different equal instances will still receive events.
      // We only guard against the case that the same object is registered
      // multiple times