code: def testAllocationInRectangleFourStructure(self):
      PcnnTestTemplates.templateAllocationInRectangleStructure(
          20,
          4,
          5,
          20,
          conn_type.GRID_FOUR,
          conn_represent.MATRIX,
          [0] * 20,
          False,
      )
  
imports: import unittest
  from pyclustering.nnet.tests.pcnn_templates import PcnnTestTemplates
  from pyclustering.nnet import conn_type, conn_represent
label_desc: Use image node_id 18 for calling the PcnnUnitTest obj's underlying member method code with example usage: obj.testAllocationInRectangleFourStructure() without return types