Paws::WAFV2::GetIPSetResponse
A token used for optimistic locking. WAF returns a token to your
get and list requests, to mark the state of the entity at the time of the
request. To make changes to the entity associated with the token, you
provide the token to operations like update and delete. WAF uses the token
to ensure that no changes have been made to the entity since you last
retrieved it. If a change has been made, the update fails with a
"WAFOptimisticLockException". If this
happens, perform another get, and use the new token returned by that
operation.