code: def __lt__(self, other) -> bool:
      if not isinstance(other, Vertex):
          raise NotImplementedError
  
      return self.uuid < other.uuid
  
imports: from __future__ import annotations
  import heapq
  import itertools
  import math
  import random
  from river import base
label_desc: Use image node_id 4 for calling the Vertex obj's underlying member method code with example usage: obj.__lt__(other) and returns: unknown