Values.AlarmHistoryItemsSourceval to_value :
AlarmHistoryItem.t list ->
[> `List of
[> `Structure of
(string
* [> `Enum of string
| `Map of
([> `String of AttributeName.t ]
* [> `String of AttributeValue.t ])
list
| `String of AlarmName.t
| `Timestamp of Timestamp.t ])
list ]
list ]