class_docstr: A setting that represents selection of multiple choices from a list
code: def parse_value(value):
      if value is None:
          return ""
      elif isinstance(value, str):
          return value
      elif hasattr(value, "__getitem__"):
          return ",".join(value)
      raise ValueError("Unexpected value type: %s" % type(value))
  
file_path: CellProfiler/src/subpackages/core/cellprofiler_core/setting/multichoice/_multichoice.py
imports: import functools
  from .._setting import Setting
  from .._validation_error import ValidationError
label_desc: Use image node_id 2 for calling the MultiChoice obj's underlying member method code with example usage: obj.parse_value(value) and returns: str, value, str