code: def getIndexRepresentor(self):
      clusters = [[0, 1, 2, 3], [4, 5, 6, 7]]
      data = [10, 11, 13, 12, 64, 65, 65, 68]
  
      return cluster_encoder(
          type_encoding.CLUSTER_INDEX_LIST_SEPARATION, clusters, data
      )
  
imports: import unittest
  import math
  import matplotlib
  from pyclustering.cluster.encoder import cluster_encoder
  from pyclustering.cluster.encoder import type_encoding
label_desc: Use image node_id 1 for calling the Test obj's underlying member method code with example usage: obj.getIndexRepresentor() and returns: cluster_encoder