code: @XmlElementDecl(namespace = "http://www.citygml.org/ade/sub/0.9.0", name = "GroundSurface", substitutionHeadNamespace = "http://www.citygml.org/ade/sub/0.9.0", substitutionHeadName = "_BoundarySurface")
      public JAXBElement<GroundSurfaceType> createGroundSurface(GroundSurfaceType value) {
          return new JAXBElement<GroundSurfaceType>(_GroundSurface_QNAME, GroundSurfaceType.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link GroundSurfaceType }{@code >}}