code: def sample_flags(self):
      return list(map(lambda n: n in self.flags, self.edges.keys()))
  
imports: from __future__ import annotations
  import heapq
  import itertools
  import math
  import random
  from river import base
label_desc: Use image node_id 14 for calling the Vertex obj's underlying member method code with example usage: obj.sample_flags() and returns: list