code: def test_parameters(self):
      assert (
          hasattr(self.estimator, "base_estimators")
          and self.estimator.base_estimators is not None
      )
  
imports: import os
  import sys
  import unittest
  import numpy
  from sklearn.cluster import KMeans
  from sklearn.cluster import MiniBatchKMeans
  from sklearn.cluster import AgglomerativeClustering
  from sklearn.datasets import load_breast_cancer
  from numpy.testing import assert_allclose
  from numpy.testing import assert_equal
  from combo.models.cluster_eac import EAC
  from combo.models.cluster_eac import _generate_similarity_mat
label_desc: Use image node_id 4 for calling the TestEAC obj's underlying member method code with example usage: obj.test_parameters() without return types