*
 * <pre>{@code
 * new TypeVisitor() {
 *   protected void visitParameterizedType(ParameterizedType t) {
 *     visit(t.getOwnerType());
 *     visit(t.getActualTypeArguments());
 *   }
 *   protected void visitGenericArrayType(GenericArrayType t) {
 *     visit(t.getGenericComponentType());
 *   }
 *   protected void visitTypeVariable(TypeVariable<?> t) {
 *     throw new IllegalArgumentException("Cannot contain type variable.");
 *   }

    }.visit(type);
  }

  public <T> void testVisitGenericArrayType() {
    Type type = new TypeCapture<T[]>() {}.capture();
    assertVisited(type);
    new BaseTypeVisitor() {
      @Override
      void visitGenericArrayType(GenericArrayType t) {}
    }.visit(type);
  }

  public <T> void testVisitParameterizedType() {
    Type type = new TypeCapture<Iterable<T>>() {}.capture();
    assertVisited(type);
    new BaseTypeVisitor() {

      }

      @Override
      void visitWildcardType(WildcardType t) {
        result.set(subtypeOfComponentType(t.getUpperBounds()));
      }

      @Override
      void visitGenericArrayType(GenericArrayType t) {
        result.set(t.getGenericComponentType());
      }

      @Override
      void visitClass(Class<?> t) {
        result.set(t.getComponentType());
      }

            toParameterizedType);
        for (int i = 0; i < fromArgs.length; i++) {
          populateTypeMappings(mappings, fromArgs[i], toArgs[i]);
        }
      }

      @Override
      void visitGenericArrayType(GenericArrayType fromArrayType) {
        if (to instanceof WildcardType) {
          return; // Okay to say A[] is <?>
        }
        Type componentType = Types.getComponentType(to);

            toParameterizedType);
        for (int i = 0; i < fromArgs.length; i++) {
          populateTypeMappings(mappings, fromArgs[i], toArgs[i]);
        }
      }

      @Override
      void visitGenericArrayType(GenericArrayType fromArrayType) {
        if (to instanceof WildcardType) {
          return; // Okay to say A[] is <?>
        }
        Type componentType = Types.getComponentType(to);