code: def get_choices():
      return [
          "Ball",
          "Cube",
          "Diamond",
          "Disk",
          "Octahedron",
          "Square",
          "Star",
      ]
  
file_path: CellProfiler/src/subpackages/core/cellprofiler_core/setting/_structuring_element.py
imports: import skimage.morphology
  from ._setting import Setting
  from ._validation_error import ValidationError
label_desc: Use image node_id 2 for calling the StructuringElement obj's underlying member method code with example usage: obj.get_choices() and returns: list