code: def images():
      return cellprofiler_core.image.ImageSet(0, {"number": 0}, {})
  
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 3 for calling a global function with example usage: images() and returns: cellprofiler_core