code: public List<SecurityRoleType<WebAppDescriptor>> getAllSecurityRole()
     {
        List<SecurityRoleType<WebAppDescriptor>> list = new ArrayList<SecurityRoleType<WebAppDescriptor>>();
        List<Node> nodeList = model.get("security-role");
        for(Node node: nodeList)
        {
           SecurityRoleType<WebAppDescriptor>  type = new SecurityRoleTypeImpl<WebAppDescriptor>(this, "security-role", model, node);
           list.add(type);
        }
        return list;
     }
docs: Returns all <code>security-role</code> elements
  @return list of <code>security-role</code>