code: public AuthConstraintType<SecurityConstraintType<T>> getOrCreateAuthConstraint()
     {
        Node node = childNode.getOrCreate("auth-constraint");
        AuthConstraintType<SecurityConstraintType<T>> authConstraint = new AuthConstraintTypeImpl<SecurityConstraintType<T>>(this, "auth-constraint", childNode, node);
        return authConstraint;
     }
docs: If not already created, a new <code>auth-constraint</code> element with the given value will be created.
  Otherwise, the existing <code>auth-constraint</code> element will be returned.
  @return  a new or existing instance of <code>AuthConstraintType<SecurityConstraintType<T>></code>