code: def testShowNetwork3DimensionMatrixRepr(self):
      SyncnetTestTemplates.templateShowNetwork(
          SIMPLE_SAMPLES.SAMPLE_SIMPLE11,
          1.0,
          conn_represent.MATRIX,
          False,
      )
  
imports: import unittest
  import matplotlib
  from pyclustering.nnet import initial_type, conn_represent, solve_type
  from pyclustering.cluster.tests.syncnet_templates import SyncnetTestTemplates
  from pyclustering.cluster.syncnet import syncnet, syncnet_visualizer
  from pyclustering.utils import read_sample
  from numpy import pi
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
label_desc: Use image node_id 28 for calling the SyncnetUnitTest obj's underlying member method code with example usage: obj.testShowNetwork3DimensionMatrixRepr() without return types