code: public SecurityRoleType<WebFragmentDescriptor> getOrCreateSecurityRole()
     {
        List<Node> nodeList = model.get("security-role");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new SecurityRoleTypeImpl<WebFragmentDescriptor>(this, "security-role", model, nodeList.get(0));
        }
        return createSecurityRole();
     }
docs: If not already created, a new <code>security-role</code> element will be created and returned.
  Otherwise, the first existing <code>security-role</code> element will be returned.
  @return the instance defined for the element <code>security-role</code>