code: def get_node_nsamples(self, id):
      def _get_nsamples(spark_version):
          if spark_version >= 3:
              return self.tree_nodes[id].impurityStats().rawCount()
          elif spark_version >= 2:
              return self.tree_nodes[id].impurityStats().count()
          else:
              raise Exception("dtreeviz supports spark versions >= 2")
  
      return _get_nsamples(ShadowSparkTree._get_pyspark_major_version())
  
imports: from abc import ABC
  from collections import defaultdict
  from typing import List, Mapping
  import numpy
  import pyspark
  from dtreeviz.models.shadow_decision_tree import ShadowDecTree
  from dtreeviz.utils import criterion_remapping
  from pyspark.ml.classification import DecisionTreeClassificationModel
  from pyspark.ml.regression import DecisionTreeRegressionModel
label_desc: Use image node_id 16 for calling the ShadowSparkTree obj's underlying member method code with example usage: obj.get_node_nsamples(id) and returns: _get_nsamples, self, self