code: @XmlElementDecl(namespace = "http://www.opengis.net/citygml/cityobjectgroup/2.0", name = "CityObjectGroup", substitutionHeadNamespace = "http://www.opengis.net/citygml/2.0", substitutionHeadName = "_CityObject")
      public JAXBElement<CityObjectGroupType> createCityObjectGroup(CityObjectGroupType value) {
          return new JAXBElement<CityObjectGroupType>(_CityObjectGroup_QNAME, CityObjectGroupType.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link CityObjectGroupType }{@code >}
  
  @param value
  Java instance representing xml element's value.
  @return
  the new instance of {@link JAXBElement }{@code <}{@link CityObjectGroupType }{@code >}