code: @XmlElementDecl(namespace = "http://www.opengis.net/citygml/appearance/1.0", name = "X3DMaterial", substitutionHeadNamespace = "http://www.opengis.net/citygml/appearance/1.0", substitutionHeadName = "_SurfaceData")
      public JAXBElement<X3DMaterialType> createX3DMaterial(X3DMaterialType value) {
          return new JAXBElement<X3DMaterialType>(_X3DMaterial_QNAME, X3DMaterialType.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link X3DMaterialType }{@code >}
  
  @param value
  Java instance representing xml element's value.
  @return
  the new instance of {@link JAXBElement }{@code <}{@link X3DMaterialType }{@code >}