class_docstr: Wrapper for a pre-pickled object
  
  Used for pre-emptively pickling re-used objects
  to avoid pickling the same object several times.
code: def __init__(self, obj):
      self.buffers = serialize_object(obj)
  
file_path: ipyparallel/ipyparallel/serialize/serialize.py
imports: from itertools import chain
  from jupyter_client.session import MAX_BYTES, MAX_ITEMS
  from .canning import CannedObject, can, can_sequence, istype, sequence_types, uncan, uncan_sequence
label_desc: Use image node_id 1 to create a new PrePickled object  with example: obj = PrePickled(obj)