Sourceval to_value :
WebACLUpdate.t list->[> `List of
[> `Structure of
(string
* [> `Enum of string| `Structure of
(string
* [> `Enum of string| `Integer of RulePriority.t| `List of
[> `Structure of
(string * [> `String of ResourceId.t ]) list ]
list| `String of ResourceId.t| `Structure of (string * [> `Enum of string ]) list ])
list ])
list ]
list ]