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