}
  }

  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

      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}."
    }

        property.empty()
        assertValueIs([])
    }

    def "throws NullPointerException when provider returns list with null to property"() {
        given:
        property.addAll(Providers.of([null]))

        when:
        property.get()

        then:
        def ex = thrown(NullPointerException)
    }

    def "throws NullPointerException when adding a null value to the property"() {
        when:

    @Override
    public <T> T get(Class<T> serviceType) throws UnknownServiceException, ServiceLookupException {
        return serviceType.cast(get((Type) serviceType));
    }

    @Override
    public Object get(Type serviceType) throws UnknownServiceException, ServiceLookupException {
        Object instance = find(serviceType);
        if (instance == null) {

        } catch (ClassGenerationException e) {
            throw e;
        } catch (Throwable e) {
            TreeFormatter formatter = new TreeFormatter();
            formatter.node("Could not generate a decorated class for type ");
            formatter.appendType(type);
            formatter.append(".");
            throw new ClassGenerationException(formatter.toString(), e);
        }

    private DummyInternalEntry() {
      throw new AssertionError();
    }

    @Override
    public DummyInternalEntry getNext() {
      throw new AssertionError();
    }

    @Override
    public int getHash() {
      throw new AssertionError();
    }

    @Override
    public Object getKey() {
      throw new AssertionError();
    }

    @Override

   */
  fun queryParameterName(index: Int): String {
    if (queryNamesAndValues == null) throw IndexOutOfBoundsException()
    return queryNamesAndValues[index * 2]!!
  }

  /**
   * Returns the value of the query parameter at `index`. For example this returns `"apple"` for
   * `queryParameterName(0)` on `http://host/?a=apple&b=banana`. This throws if `index` is not less
   * than the [query size][querySize].
   *

    @SuppressWarnings("unused")
    public static void propertyValueConvertFailure(Class<?> viewType, String propertyName, Object value, TypeConversionException failure) throws UnsupportedPropertyValueException {
        throw new UnsupportedPropertyValueException(String.format("Cannot set property: %s for class: %s to value: %s.", propertyName, viewType.getName(), value), failure);
    }