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