code: @XmlElementDecl(namespace = "http://www.w3.org/1998/Math/MathML", name = "cartesianproduct")
      public JAXBElement<CartesianproductType> createCartesianproduct(CartesianproductType value) {
          return new JAXBElement<CartesianproductType>(_Cartesianproduct_QNAME, CartesianproductType.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link CartesianproductType }{@code >}}