}

  /** Proxy to throw a {@link RuntimeException} out of the {@link #get()} method. */
  public static class BadFuture extends SimpleForwardingListenableFuture<Integer> {
    protected BadFuture(ListenableFuture<Integer> delegate) {
      super(delegate);
    }

    @Override
    public Integer get() {
      throw new RuntimeException("Oops");
    }
  }

      collection.retainAll(target.toRetain);
      String message = Platform.format("retainAll(%s) should throw", target);
      fail(message);
    } catch (UnsupportedOperationException expected) {
    }
  }

  private void expectReturnsFalseOrThrows(Target target) {
    String message = Platform.format("retainAll(%s) should return false or throw", target);
    try {
      assertFalse(message, collection.retainAll(target.toRetain));

      assertTrue("setUp should have run", setUpRan.get());
      try {
        return method.invoke(map, args);
      } catch (InvocationTargetException e) {
        throw e.getCause();
      } catch (IllegalAccessException e) {
        throw newLinkageError(e);
      }
    }
  }

  /** Verifies that {@code setUp} and {@code tearDown} are called in all map test cases. */

      }
    }
    return containsAll(that);
  }

  @Override
  public E first() {
    if (isEmpty()) {
      throw new NoSuchElementException();
    }
    return elements.get(0);
  }

  @Override
  public E last() {
    if (isEmpty()) {
      throw new NoSuchElementException();
    }
    return elements.get(size() - 1);
  }

  @Override
  @CheckForNull

    @Override
    public int previousIndex() {
      return nextIndex - 1;
    }

    @Override
    public void set(Entry<K, V> e) {
      throw new UnsupportedOperationException();
    }

    @Override
    public void add(Entry<K, V> e) {
      throw new UnsupportedOperationException();
    }

    void setValue(@ParametricNullness V value) {
      checkState(current != null);

      int i;

      @Override
      public boolean hasNext() {
        return i < array.length;
      }

      @Override
      public String next() {
        if (!hasNext()) {
          throw new NoSuchElementException();
        }
        return array[i++];
      }

      @Override
      public boolean hasPrevious() {
        return i > 0;
      }

      @Override

      assertTrue("setUp should have run", setUpRan.get());
      try {
        return method.invoke(map, args);
      } catch (InvocationTargetException e) {
        throw e.getCause();
      } catch (IllegalAccessException e) {
        throw newLinkageError(e);
      }
    }
  }

  /** Verifies that {@code setUp} and {@code tearDown} are called in all map test cases. */

      default:
        throw new IllegalStateException("Unexpected edge type: " + edgeType);
    }
  }

  private static EdgeType oppositeType(EdgeType edgeType) {
    switch (edgeType) {
      case UNDIRECTED:
        return EdgeType.DIRECTED;
      case DIRECTED:
        return EdgeType.UNDIRECTED;
      default:
        throw new IllegalStateException("Unexpected edge type: " + edgeType);
    }

  public Entry<E> lastEntry() {
    return delegate().lastEntry();
  }

  @Override
  @CheckForNull
  public Entry<E> pollFirstEntry() {
    throw new UnsupportedOperationException();
  }

  @Override
  @CheckForNull
  public Entry<E> pollLastEntry() {
    throw new UnsupportedOperationException();
  }

  @Override
  public SortedMultiset<E> headMultiset(E upperBound, BoundType boundType) {

   * multiset, so changes to one will be reflected in the other. The returned multiset supports all
   * operations that this multiset supports.
   *
   * <p>The returned multiset will throw an {@link IllegalArgumentException} on attempts to add
   * elements outside its range.
   */
  SortedMultiset<E> headMultiset(@ParametricNullness E upperBound, BoundType boundType);

  /**