class_docstr: A subclass of pickler, to do cryptographic hashing, rather than
  pickling.
class_docstr_tok: ["A","subclass","of","pickler",",","to","do","cryptographic","hashing",",","rather","than","pickling","."]
code: def save_set(self, set_items):
      # forces order of items in Set to ensure consistent hash
      Pickler.save(self, _ConsistentSet(set_items))
  
imports: import pickle
  import hashlib
  import sys
  import types
  import struct
  import io
  from ._compat import _bytes_or_unicode, PY3_OR_LATER
label_desc: Use image node_id 7 for calling the Hasher obj's underlying member method code with example usage: obj.save_set(set_items) without return types