code: @XmlElementDecl(namespace = "http://www.w3.org/2001/XMLSchema", name = "attributeGroup")
      public JAXBElement<NamedAttributeGroup> createAttributeGroup(NamedAttributeGroup value) {
          return new JAXBElement<NamedAttributeGroup>(_AttributeGroup_QNAME, NamedAttributeGroup.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link NamedAttributeGroup }{@code >}}