code: private void assertTargetsPerRolloutGroupQuota(final long requested) {
          final int quota = quotaManagement.getMaxTargetsPerRolloutGroup();
          QuotaHelper.assertAssignmentQuota(requested, quota, Target.class, RolloutGroup.class);
      }
docs: Enforces the quota defining the maximum number of {@link Target}s per
  {@link RolloutGroup}.
  
  @param group
  The rollout group
  @param requested
  number of targets to check