try {
      iterator.next();
      fail("no exception thrown");
    } catch (NoSuchElementException expected) {
    }
    try {
      iterator.previous();
      fail("no exception thrown");
    } catch (NoSuchElementException expected) {
    }
    try {
      iterator.remove();
      fail("no exception thrown");
    } catch (UnsupportedOperationException expected) {
    }

      fail();
    } catch (IllegalArgumentException expected) {
    }

    try {
      Set<Set<Integer>> unused = powerSet(ContiguousSet.closed(0, Integer.MAX_VALUE / 2));
      fail();
    } catch (IllegalArgumentException expected) {
    }

    try {
      powerSet(singleton(null));
      fail();
    } catch (NullPointerException expected) {
    }
  }

    LoadingCache<Object, Object> cacheChecked =
        CacheBuilder.newBuilder().build(exceptionLoader(ee));

    try {
      cacheUnchecked.get(new Object());
      fail();
    } catch (ExecutionException e) {
      fail();
    } catch (UncheckedExecutionException caughtEe) {
      assertThat(caughtEe).hasCauseThat().isSameInstanceAs(uee);
    }

    UncheckedExecutionException caughtUee =

    /**
     * Associates {@code key} with {@code value} in the built map. Duplicate keys, according to the
     * comparator (which might be the keys' natural order), are not allowed, and will cause {@link
     * #build} to fail.
     */
    @CanIgnoreReturnValue
    @Override
    public Builder<K, V> put(K key, V value) {
      ensureCapacity(size + 1);
      checkEntryNotNull(key, value);
      keys[size] = key;

   * Ensures the truth of an expression involving one or more parameters to the calling method.
   *
   * @param expression a boolean expression
   * @param errorMessageTemplate a template for the exception message should the check fail. The
   *     message is formed by replacing each {@code %s} placeholder in the template with an
   *     argument. These are matched by position - the first {@code %s} gets {@code

    try {
      diff1.entriesInCommon().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      diff1.entriesOnlyOnLeft().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      diff1.entriesOnlyOnRight().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

    try {
      diff1.entriesInCommon().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      diff1.entriesOnlyOnLeft().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      diff1.entriesOnlyOnRight().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

    LoadingCache<Object, Object> cacheChecked =
        CacheBuilder.newBuilder().build(exceptionLoader(ee));

    try {
      cacheUnchecked.get(new Object());
      fail();
    } catch (ExecutionException e) {
      fail();
    } catch (UncheckedExecutionException caughtEe) {
      assertThat(caughtEe).hasCauseThat().isSameInstanceAs(uee);
    }

    UncheckedExecutionException caughtUee =

    /**
     * Associates {@code key} with {@code value} in the built map. Duplicate keys, according to the
     * comparator (which might be the keys' natural order), are not allowed, and will cause {@link
     * #build} to fail.
     */
    @CanIgnoreReturnValue
    @Override
    public Builder<K, V> put(K key, V value) {
      super.put(key, value);
      return this;
    }

    /**

            failure = new Failure(t);
          } catch (Exception | Error oomMostLikely) { // sneaky checked exception
            failure = Failure.FALLBACK_INSTANCE;
          }
          // Note: The only way this CAS could fail is if cancel() has raced with us. That is ok.
          boolean unused = ATOMIC_HELPER.casValue(this, valueToSet, failure);
        }
        return true;
      }