class_docstr: Python class for ordered set.
  Code taken from https://github.com/buyalsky/ordered-hash-set/tree/5198b23e01faeac3f5398ab2c08cb013d14b3702.
code: def __str__(self):
      elements = [str(i) for i in self]
      string = "OrderedSet(" + ",".join(elements) + ")"
      return string
  
file_path: dowhy/dowhy/utils/ordered_set.py
label_desc: Use image node_id 12 for calling the OrderedSet obj's underlying member method code with example usage: obj.__str__() and returns: string