code: public AssemblyDescriptorType<EjbJarDescriptor> getOrCreateAssemblyDescriptor()
     {
        Node node = model.getOrCreate("assembly-descriptor");
        AssemblyDescriptorType<EjbJarDescriptor> assemblyDescriptor = new AssemblyDescriptorTypeImpl<EjbJarDescriptor>(this, "assembly-descriptor", model, node);
        return assemblyDescriptor;
     }
docs: If not already created, a new <code>assembly-descriptor</code> element with the given value will be created.
  Otherwise, the existing <code>assembly-descriptor</code> element will be returned.
  @return  a new or existing instance of <code>AssemblyDescriptorType<EjbJarDescriptor></code>