class_docstr: Class representing Treap (Cartesian Tree) used to calculate the Incremental KS statistics.
code: def unlazy(cls, node):
      cls.sum_all(node.left, node.lazy)
      cls.sum_all(node.right, node.lazy)
      node.lazy = 0
  
imports: from __future__ import annotations
  import math
  import random
  from river import base, stats
label_desc: Use image node_id 3 for calling the Treap obj's underlying member method code with example usage: obj.unlazy(cls, node) without return types