Values.DBSubnetGroupsSourceval to_value :
DBSubnetGroup.t list ->
[> `List of
[> `Structure of
(string
* [> `List of
[> `Structure of
(string
* [> `String of String_.t
| `Structure of
(string * [> `String of String_.t ]) list ])
list ]
list
| `String of String_.t ])
list ]
list ]