class_docstr: Class that mimics a cluster that does not expose `cluster_centers_`.
code: def predict(self, X):
      return np.zeros(len(X), dtype=int)
  
imports: import inspect
  import pkgutil
  from importlib import import_module
  from operator import itemgetter
  from pathlib import Path
  import numpy
  from scipy import sparse
  from sklearn.base import BaseEstimator
  from sklearn.neighbors import KDTree
  from sklearn.utils._testing import ignore_warnings
label_desc: Use image node_id 3 for calling the _CustomClusterer obj's underlying member method code with example usage: obj.predict(X) and returns: np