code: def test_get_all_paths_none():
      module = cellprofiler.modules.untangleworms.UntangleWorms()
  
      class Result(object):
          def __init__(self):
              self.branch_areas = []
              self.segments = []
              self.incidence_matrix = numpy.zeros((0, 0), bool)
  
      path_list = list(module.get_all_paths(Result(), 0, 1000))
      assert len(path_list) == 0
  
imports: import base64
  import io
  import os
  import tempfile
  import zlib
  import imageio
  import centrosome.outline
  import numpy
  import scipy.ndimage
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  import cellprofiler_core.modules
  import cellprofiler.modules.untangleworms
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.preferences
  import cellprofiler_core.setting
  import cellprofiler_core.workspace
  import tests.frontend.modules
label_desc: Use image node_id 20 for calling a global function with example usage: test_get_all_paths_none() without return types