@Explain(displayName="Unset Query parallelism", displayOnlyOnTrue=true,
      explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
  public boolean isUnsetQueryParallelism() {
    return unsetQueryParallelism;
  }
DDL task description for ALTER RESOURCE PLAN ... UNSET ... commands.
ql/src/java/org/apache/hadoop/hive/ql/ddl/workloadmanagement/resourceplan/alter/unset/AlterResourcePlanUnsetDesc.java