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