code: private void assertMaxTargetsPerManualAssignmentQuota(final Long distributionSetId,
              final int requestedTargetsCount) {
          QuotaHelper.assertAssignmentQuota(distributionSetId, requestedTargetsCount,
                  quotaManagement.getMaxTargetsPerManualAssignment(), Target.class, DistributionSet.class, null);
      }
docs: Enforces the quota defining the maximum number of {@link Target}s per
  manual {@link DistributionSet} assignment.
  
  @param id
  of the distribution set
  @param requested
  number of targets to check