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