public SpaceViolationPolicyEnforcement getPolicyEnforcement(Region r) {
    return getPolicyEnforcement(Objects.requireNonNull(r).getTableDescriptor().getTableName());
  }
Returns the proper {@link SpaceViolationPolicyEnforcement} implementation for the given table.
If the given table does not have a violation policy enforced, a "no-op" policy will be returned
which always allows an action.
@see #getPolicyEnforcement(TableName)
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/ActivePolicyEnforcement.java