public StringBuilder toString(StringBuilder sb) {
      sb.append("RangerPolicyItemDataMaskInfo={");
      sb.append("filterExpr={").append(filterExpr).append("} ");
      sb.append("}");
      return sb;
    }
Ranger policyItem Row-filter info class.
ql/src/java/org/apache/hadoop/hive/ql/exec/repl/ranger/RangerPolicy.java