@Override
          public void visitUserQuotas(String userName, TableName table, Quotas quotas) {
            quotas = updateClusterQuotaToMachineQuota(quotas,
              tableMachineQuotaFactors.containsKey(table)
                ? tableMachineQuotaFactors.get(table)
                : 1);
            quotaInfo.setQuotas(table, quotas);
          }
Returns true if the support for quota is enabled
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/QuotaUtil.java