for (E e : contents) {
          E unused = interner.intern(e);
        }
        return interner;
      }
    },
    StrongInternerImpl {
      @Override
      public <E> Interner<E> create(Collection<E> contents) {
        Interner<E> interner = Interners.newStrongInterner();
        for (E e : contents) {
          E unused = interner.intern(e);
        }
        return interner;

    // get the first non-null value
    Collection<V> values = map.values();
    for (V value : values) {
      if (value != null) {
        try {
          int unused = value.hashCode();
        } catch (Exception e) { // sneaky checked exception
          return false;
        }
        return true;
      }
    }
    return true;
  }

  /**

   * the documentation for {@link #fromValid(String)}.
   */
  public static boolean isValid(String specifier) {
    try {
      HostSpecifier unused = fromValid(specifier);
      return true;
    } catch (IllegalArgumentException e) {
      return false;
    }
  }

  @Override
  public boolean equals(@Nullable Object other) {

    }
    return sub;
  }

  /**
   * Call this in a {@link TestSubtype} public method asserting that subtype relationship does not
   * hold.
   */
  final <X> @Nullable X notSubtype(@SuppressWarnings("unused") Object sub) {
    Type returnType = method.getGenericReturnType();
    Type paramType = getOnlyParameterType();
    TestSubtype spec = method.getAnnotation(TestSubtype.class);

                for (Integer node : graph.nodes()) {
                  Set<Integer> unused = graph.successors(node);
                }
                /*
                 * Also look up an earlier node so that, if the graph is using MapRetrievalCache,
                 * we read one of the fields declared in that class.
                 */
                Set<Integer> unused = graph.successors(first);

            Striped.lazyWeakReadWriteLock(Integer.MAX_VALUE))) {
      for (int i = 0; i < 3; i++) {
        // doesn't throw exception
        Object unused = striped.getAt(Integer.MAX_VALUE - i);
      }
    }
  }

            Striped.lazyWeakReadWriteLock(Integer.MAX_VALUE))) {
      for (int i = 0; i < 3; i++) {
        // doesn't throw exception
        Object unused = striped.getAt(Integer.MAX_VALUE - i);
      }
    }
  }

        ImmutableRangeMap.Builder<Integer, Integer> builder = ImmutableRangeMap.builder();
        builder.put(range1, 1).put(range2, 2);
        try {
          ImmutableRangeMap<Integer, Integer> unused = builder.build();
          assertFalse(expectRejection);
        } catch (IllegalArgumentException e) {
          assertTrue(expectRejection);
        }
      }
    }
  }

  public void testGet() {

  }

  public void testReentrantHasNext() {
    Iterator<Integer> iter =
        new AbstractIterator<Integer>() {
          @Override
          protected Integer computeNext() {
            boolean unused = hasNext();
            throw new AssertionError();
          }
        };
    assertThrows(IllegalStateException.class, iter::hasNext);
  }

  }

  public void testReentrantHasNext() {
    Iterator<Integer> iter =
        new AbstractIterator<Integer>() {
          @Override
          protected Integer computeNext() {
            boolean unused = hasNext();
            throw new AssertionError();
          }
        };
    assertThrows(IllegalStateException.class, iter::hasNext);
  }