class_docstr: DenStream Micro-cluster class
code: def _weight(self, fading_factor):
      return self.N * fading_factor
  
imports: from __future__ import annotations
  import copy
  import math
  from abc import ABCMeta
  from collections import defaultdict, deque
  from river import base, utils
label_desc: Use image node_id 4 for calling the DenStreamMicroCluster obj's underlying member method code with example usage: obj._weight(fading_factor) and returns: unknown