static class CountingSupplier implements Supplier<Integer> {
    int calls = 0;

    @Override
    public Integer get() {
      calls++;
      return calls * 10;
    }

    @Override
    public String toString() {
      return "CountingSupplier";
    }
  }

  static class ThrowingSupplier implements Supplier<Integer> {
    @Override
    public Integer get() {
      throw new NullPointerException();
    }
  }

  static class CountingSupplier implements Supplier<Integer> {
    int calls = 0;

    @Override
    public Integer get() {
      calls++;
      return calls * 10;
    }

    @Override
    public String toString() {
      return "CountingSupplier";
    }
  }

  static class ThrowingSupplier implements Supplier<Integer> {
    @Override
    public Integer get() {
      throw new NullPointerException();
    }
  }

      @Override
      protected Iterator<Integer> newTargetIterator() {
        multimap = LinkedHashMultimap.create();
        multimap.putAll("foo", asList(2, 3, 4));
        multimap.putAll("bar", asList(5, 6));
        multimap.putAll("foo", asList(7, 8));
        return multimap.get("foo").iterator();
      }

      @Override
      protected void verify(List<Integer> elements) {

        @Override
        int writeSetupWireFormat(byte[] dst, int dstIndex) {
            return 0;
        }

        @Override
        int writeParametersWireFormat(byte[] dst, int dstIndex) {
            return 0;
        }

        @Override
        int writeDataWireFormat(byte[] dst, int dstIndex) {
            return 0;
        }

        this.type = type;
    }

    @Override
    public final String getType() {
        return type != null ? type : model.getType();
    }

    @Override
    public final ToolchainModel getModel() {
        return model;
    }

    public final void addProvideToken(String type, RequirementMatcher matcher) {
        provides.put(type, matcher);
    }

    @Override

            this.id = id;
            this.fallback = fallback;
        }

        @Override
        public String getId() {
            return id;
        }

        @Override
        public String pathOf(Artifact artifact) {
            return fallback.pathOf(artifact);
        }

        @Override

  // This declaration is needed to make List.iterator() and
  // ImmutableCollection.iterator() consistent.
  @Override
  public UnmodifiableIterator<E> iterator() {
    return listIterator();
  }

  @Override
  public UnmodifiableListIterator<E> listIterator() {
    return listIterator(0);
  }

  @Override
  public UnmodifiableListIterator<E> listIterator(int index) {

            }

            @Nonnull
            @Override
            public Optional<Source> getInstallationSettingsSource() {
                return Optional.ofNullable(installationSettingsSource);
            }

            @Nonnull
            @Override
            public Optional<Source> getProjectSettingsSource() {

      @Override
      public int size() {
        return max(0, data.size() + delta);
      }

      @Override
      public T get(int index) {
        return data.get(index);
      }

      @Override
      public T set(int index, T element) {
        return data.set(index, element);
      }

      @Override
      public boolean add(T element) {

            @Override
            public String getClassifier() {
                return classifier;
            }

            @Override
            public String getExtension() {
                return extension;
            }

            @Override
            public String getType() {
                return type;
            }

            @Override
            public String getCoordinatesString() {