A fingerprint for the Route Policy being applied to this Router, which is
essentially a hash of the Route Policy used for optimistic locking.
The fingerprint is initially generated by Compute Engine and changes
after every request to modify or update Route Policy. You must always
provide an up-to-date fingerprint hash in order to update or change
labels.
List of terms (the order in the list is not important, they are evaluated
in order of priority). Order of policies is not retained and might change
when getting policy later.