}

    @Override
    public ModelBuildingResult build(ModelBuildingRequest request) throws ModelBuildingException {
        return build(request, new LinkedHashSet<>());
    }

    protected ModelBuildingResult build(ModelBuildingRequest request, Collection<String> importIds)
            throws ModelBuildingException {
        // phase 1

            throw new UnsupportedOperationException()
        }

        @Override
        Object find(Type serviceType) throws ServiceLookupException {
            throw new UnsupportedOperationException()
        }

        @Override
        def <T> Factory<T> getFactory(Class<T> type) throws UnknownServiceException, ServiceLookupException {

     *
     * <p>If a task with the given name already exists in this project, an exception is thrown.</p>
     *
     * @param name The name of the task to be created
     * @return The newly created task object
     * @throws InvalidUserDataException If a task with the given name already exists in this project.
     */
    Task task(String name) throws InvalidUserDataException;

    /**

      sb.append(iterator.next());
    }
    return sb.append(']').toString();
  }

  /**
   * Returns the single element contained in {@code iterator}.
   *
   * @throws NoSuchElementException if the iterator is empty
   * @throws IllegalArgumentException if the iterator contains multiple elements. The state of the
   *     iterator is unspecified.
   */
  @ParametricNullness

      sb.append(iterator.next());
    }
    return sb.append(']').toString();
  }

  /**
   * Returns the single element contained in {@code iterator}.
   *
   * @throws NoSuchElementException if the iterator is empty
   * @throws IllegalArgumentException if the iterator contains multiple elements. The state of the
   *     iterator is unspecified.
   */
  @ParametricNullness

   *
   * <p>The default {@link AbstractFuture} implementation throws {@code InterruptedException} if the
   * current thread is interrupted during the call, even if the value is already available.
   *
   * @throws CancellationException {@inheritDoc}
   */
  @CanIgnoreReturnValue
  @Override
  @ParametricNullness
  public V get(long timeout, TimeUnit unit)
      throws InterruptedException, TimeoutException, ExecutionException {

   *
   * <p>The default {@link AbstractFuture} implementation throws {@code InterruptedException} if the
   * current thread is interrupted during the call, even if the value is already available.
   *
   * @throws CancellationException {@inheritDoc}
   */
  @CanIgnoreReturnValue
  @Override
  @ParametricNullness
  public V get(long timeout, TimeUnit unit)
      throws InterruptedException, TimeoutException, ExecutionException {

    }
  }

  public void testToStringImplWithNullKeys() throws Exception {
    Map<@Nullable String, String> hashmap = Maps.newHashMap();
    hashmap.put("foo", "bar");
    hashmap.put(null, "baz");

    assertEquals(hashmap.toString(), Maps.toStringImpl(hashmap));
  }

  public void testToStringImplWithNullValues() throws Exception {
    Map<String, @Nullable String> hashmap = Maps.newHashMap();

      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(@ParametricNullness K key, Iterable<? extends V> values) {
      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
      throw new UnsupportedOperationException();
    }

    @Override

    }

    def "throws NullPointerException when adding an entry with a null key to the property"() {
        when:
        property.put(null, (String) 'v')
        then:
        def ex = thrown NullPointerException
        ex.message == "Cannot add an entry with a null key to a property of type ${type().simpleName}."
    }