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