Associate resources to a Firewall Manager resource set.
See https://www.paws-r-sdk.com/docs/fms_batch_associate_resource/ for full documentation.
fms_batch_associate_resource(ResourceSetIdentifier, Items)
[required] A unique identifier for the resource set, used in a request to refer to the resource set.
[required] The uniform resource identifiers (URIs) of resources that should be associated to the resource set. The URIs must be Amazon Resource Names (ARNs).