}

      @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());
      }