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