code: @XmlElementDecl(namespace = "http://www.w3.org/1998/Math/MathML", name = "none")
      public JAXBElement<NoneType> createNone(NoneType value) {
          return new JAXBElement<NoneType>(_None_QNAME, NoneType.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link NoneType }{@code >}}