Map<TableName, SpaceViolationPolicyEnforcement> copyActiveEnforcements() {
    // Allows reads to happen concurrently (or while the map is being updated)
    return new HashMap<>(this.enforcedPolicies);
  }
Returns the collection of tables which have quota violation policies enforced on this
RegionServer.
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/RegionServerSpaceQuotaManager.java