code: @XmlElementDecl(namespace = "http://www.opengis.net/citygml/2.0", name = "CityModel", substitutionHeadNamespace = "http://www.opengis.net/gml", substitutionHeadName = "_FeatureCollection")
      public JAXBElement<CityModelType> createCityModel(CityModelType value) {
          return new JAXBElement<CityModelType>(_CityModel_QNAME, CityModelType.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link CityModelType }{@code >}
  
  @param value
  Java instance representing xml element's value.
  @return
  the new instance of {@link JAXBElement }{@code <}{@link CityModelType }{@code >}