code: def branch_no(self, x) -> int:
      if x[self.feature] <= self.threshold:
          return 0
      return 1
  
imports: from __future__ import annotations
  import collections
  import math
  from river import base, stats
  from river.tree.base import Branch, Leaf
  from river.utils.math import log_sum_2_exp
label_desc: Use image node_id 2 for calling the MondrianBranch obj's underlying member method code with example usage: obj.branch_no(x) and returns: int, int