crecord: add skipfolded param to previtem
This just simplifies the API a bit so it matches `nextitem` and I
can handle both nextitem and previtem symmetrically.
# Copyright 2016-present Facebook. All Rights Reserved.
#
# error: errors used in fastannotate
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
class CorruptedFileError(Exception):
pass
class CannotReuseError(Exception):
"""cannot reuse or update the cache incrementally"""