code: def test_annotations():
      def f(a: int):
          return a
  
      f2 = roundtrip(f)
      assert f2.__annotations__ == f.__annotations__
  
file_path: ipyparallel/ipyparallel/tests/test_canning.py
imports: import os
  import pickle
  from binascii import b2a_hex
  from functools import partial
  from ipyparallel.serialize import canning
  from ipyparallel.serialize.canning import can, uncan
label_desc: Use image node_id 13 for calling a global function with example usage: test_annotations() and returns: a