Values.DescribeEntityAggregatesRequestSourceReturns the number of entities that are affected by each of the specified events.
type nonrec t = {eventArns : EventArnsList.t option;A list of event ARNs (unique identifiers). For example: "arn:aws:health:us-east-1::event/EC2/EC2_INSTANCE_RETIREMENT_SCHEDULED/EC2_INSTANCE_RETIREMENT_SCHEDULED_ABC123-CDE456", "arn:aws:health:us-west-1::event/EBS/AWS_EBS_LOST_VOLUME/AWS_EBS_LOST_VOLUME_CHI789_JKL101"
*)}val to_value :
t ->
[> `Structure of
(string * [> `List of [> `String of EventArn.t ] list ]) list ]