@GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 1L;

      @Override
      public boolean contains(@Nullable Object element) {
        Preconditions.checkNotNull(element);
        return super.contains(element);
      }
    }
    Collection<Integer> nums = new CollectionThatThrowsNullPointerException<>();
    Predicate<@Nullable Integer> isFalse = Predicates.in(nums);

        assertTrue(actual.contains(expectedContains), "toString should contain the 'addrEntry' part");
        assertTrue(actual.contains("192.168.1.1"), "toString should contain the first NbtAddress string representation");
        assertTrue(actual.contains("10.0.0.5"), "toString should contain the second NbtAddress string representation");
    }

    /**

    public boolean isEmpty() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.isEmpty();
    }

    @Override
    public boolean contains(Object object) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.contains(object);
    }

    @Override
    public boolean add(E element) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.add(element);
    }

    }
  }

  public void testOverriddenAndAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenAndAnnotatedInSubclassEvents).contains(EVENT);
  }

  public void testOverriddenNotAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenInSubclassEvents).contains(EVENT);
  }

  @Override
  SubClass createSubscriber() {
    return new SubClass();
  }

    }
  }

  public void testOverriddenAndAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenAndAnnotatedInSubclassEvents).contains(EVENT);
  }

  public void testOverriddenNotAnnotatedInSubclass() {
    assertThat(getSubscriber().overriddenInSubclassEvents).contains(EVENT);
  }

  @Override
  SubClass createSubscriber() {
    return new SubClass();
  }

		// passing invalid bucket names.
		{"------", false},
		{"my..bucket", false},
		{"192.168.1.1", false},
		{"$this-is-not-valid-too", false},
		{"contains-$-dollar", false},
		{"contains-^-caret", false},
		{"contains-$-dollar", false},
		{"contains-$-dollar", false},
		{"......", false},
		{"", false},
		{"a", false},
		{"ab", false},
		{".starts-with-a-dot", false},
		{"ends-with-a-dot.", false},

        String result = provider.toString();
        assertNotNull(result);
        assertTrue(result.length() > 0);
        // Check that it contains class name or relevant info
        assertTrue(result.contains("FessTimeResourceProvider") || result.contains("adjustTimeMillis"));
    }

    // Test multiple provider instances
    public void test_multipleInstances() {

            if (expectDirSlashMsg) {
                assertTrue(ex.getMessage().contains("directory must end with '/'"),
                        "Expected trailing slash message, was: " + ex.getMessage());
            } else {
                assertTrue(ex.getMessage().contains("invalid") || ex.getMessage().contains("invalid:"),
                        "Expected invalid list operation message, was: " + ex.getMessage());

        String toStringResult = exception.toString();
        assertNotNull(toStringResult);
        assertTrue(toStringResult.contains(UnsupportedSearchException.class.getName()));
        assertTrue(toStringResult.contains(message));
    }

    public void test_getMessage_consistency() {
        // Test that getMessage returns the same value consistently

    for (Map<C, V> row : rowMap().values()) {
      if (row.containsValue(value)) {
        return true;
      }
    }
    return false;
  }

  @Override
  public boolean contains(@Nullable Object rowKey, @Nullable Object columnKey) {
    Map<C, V> row = safeGet(rowMap(), rowKey);
    return row != null && Maps.safeContainsKey(row, columnKey);
  }

  @Override