code: def repr_split(self):
      return f"{self.feature} < {self.threshold:.5f}"
  
imports: from __future__ import annotations
  import collections
  import functools
  import random
  from river import anomaly, base, tree
label_desc: Use image node_id 6 for calling the HSTBranch obj's underlying member method code with example usage: obj.repr_split() and returns: self, str, self