code: @Override
    public State getFinalState() {
      State state = new State();
      for (RowLevelPolicy policy : this.list) {
        state.addAll(policy.getFinalState());
      }
      return state;
    }
docs: Get final state for this object, obtained by merging the final states of the
  {@link org.apache.gobblin.qualitychecker.row.RowLevelPolicy}s used by this object.
  @return Merged {@link org.apache.gobblin.configuration.State} of final states for
  {@link org.apache.gobblin.qualitychecker.row.RowLevelPolicy} used by this checker.