code: def testGlobalSyncGroupOscillatorGridFour(self):
      self.templateGlobalSynchronization(
          9,
          50,
          10,
          1.0,
          1.0,
          1.0,
          0.8,
          conn_type.GRID_FOUR,
          conn_represent.MATRIX,
      )
  
imports: import unittest
  import matplotlib
  from pyclustering.nnet import conn_type, conn_represent
  from pyclustering.nnet.fsync import fsync_network, fsync_visualizer
label_desc: Use image node_id 15 for calling the FsyncUnitTest obj's underlying member method code with example usage: obj.testGlobalSyncGroupOscillatorGridFour() without return types