code: def new_nominal_splitter(self):
      return spl.NominalSplitterReg()
  
imports: from __future__ import annotations
  import collections
  import functools
  import io
  import math
  import typing
  from river import anomaly, base, drift, linear_model, stats
  from river.tree import split_criterion
  from river.tree import splitter
  from .base import HoeffdingRule
label_desc: Use image node_id 2 for calling the RegRule obj's underlying member method code with example usage: obj.new_nominal_splitter() and returns: spl