code: def test_elbow_simple_12(self):
      elbow_test_template.calculate_elbow(
          SIMPLE_SAMPLES.SAMPLE_SIMPLE12,
          SIMPLE_ANSWERS.ANSWER_SIMPLE12,
          1,
          10,
          True,
      )
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.center_initializer import random_center_initializer
  from pyclustering.cluster.tests.elbow_template import elbow_test_template
  from pyclustering.samples.definitions import FCPS_SAMPLES, SIMPLE_SAMPLES, SIMPLE_ANSWERS
label_desc: Use image node_id 16 for calling the elbow_integration_test obj's underlying member method code with example usage: obj.test_elbow_simple_12() without return types