code: def test_display(self):
      pass
  
imports: import numpy
  import pytest
  import cellprofiler.modules.combineobjects
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.workspace
label_desc: Use image node_id 1 for calling the TestCombineObjects obj's underlying member method code with example usage: obj.test_display() without return types