code: def test_init():
      x = cellprofiler.modules.colortogray.ColorToGray()
  
imports: import numpy
  import pytest
  import six.moves
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  import cellprofiler.modules.colortogray
  import cellprofiler_core.modules.injectimage
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.workspace
  import tests.frontend.modules
label_desc: Use image node_id 2 for calling a global function with example usage: test_init() without return types