source.append(newPreFilledByteArray(5, 10));

    // The stream reports no bytes... importantly, it doesn't read the byte at index 5 when it
    // should be reading the byte at index 10.
    // We could use a custom InputStream instead to make the read start at index 10, but since this
    // is a racy situation anyway, this behavior seems reasonable.
    assertEquals(-1, in.read());
  }

    assertEquals(list.get(0), head.get(0));
    assertEquals(list.get(size - 2), head.get(size - 2));
    for (List<E> subList : Arrays.asList(copy, head, tail)) {
      for (int index : Arrays.asList(-1, subList.size())) {
        try {
          subList.get(index);
          fail("expected IndexOutOfBoundsException");
        } catch (IndexOutOfBoundsException expected) {
        }
      }
    }
  }

    assertEquals(list.get(0), head.get(0));
    assertEquals(list.get(size - 2), head.get(size - 2));
    for (List<E> subList : Arrays.asList(copy, head, tail)) {
      for (int index : Arrays.asList(-1, subList.size())) {
        try {
          subList.get(index);
          fail("expected IndexOutOfBoundsException");
        } catch (IndexOutOfBoundsException expected) {
        }
      }
    }
  }

    AT5(5),
    ;

    final int index;

    CharAtFunction(int index) {
      this.index = index;
    }

    @Override
    public Character apply(String string) {
      return string.charAt(index);
    }
  }

  private static Ordering<String> byCharAt(int index) {
    return Ordering.<Character>natural().onResultOf(CharAtFunction.values()[index]);
  }

         * of the array becomes null only when we iterate past it and then clear it.
         */
        I result = requireNonNull(elements[index]);
        elements[index] = null;
        index++;
        return result;
      }
    };
  }

  /**
   * Combines two iterators into a single iterator. The returned iterator iterates across the

         * of the array becomes null only when we iterate past it and then clear it.
         */
        I result = requireNonNull(elements[index]);
        elements[index] = null;
        index++;
        return result;
      }
    };
  }

  /**
   * Combines two iterators into a single iterator. The returned iterator iterates across the

      }

      @Override
      ImmutableList<Entry<V, K>> createAsList() {
        return new ImmutableAsList<Entry<V, K>>() {
          @Override
          public Entry<V, K> get(int index) {
            Entry<K, V> entry = entries[index];
            return Maps.immutableEntry(entry.getValue(), entry.getKey());
          }

          @Override
          ImmutableCollection<Entry<V, K>> delegateCollection() {

      E expected = expectedList.get(i);
      E actual = getList().get(i);
      if (expected != actual && (expected == null || !expected.equals(actual))) {
        fail("mismatch at index " + i + ": " + reportContext(expectedList));
      }
    }
  }

  /**
   * Used to delay string formatting until actually required, as it otherwise shows up in the test

  private final transient int hashCode;
  // the same values as `elements` in hashed positions (plus nulls)
  @VisibleForTesting final transient @Nullable Object[] table;
  // 'and' with an int to get a valid table index.
  private final transient int mask;

  RegularImmutableSet(Object[] elements, int hashCode, @Nullable Object[] table, int mask) {
    this.elements = elements;
    this.hashCode = hashCode;
    this.table = table;

  }

  private static class DontStringMeBro implements CharSequence {
    @Override
    public int length() {
      return 3;
    }

    @Override
    public char charAt(int index) {
      return "foo".charAt(index);
    }

    @Override
    public CharSequence subSequence(int start, int end) {
      return "foo".subSequence(start, end);
    }

    @Override
    public String toString() {