Specifications for callback functions passed in to an API.
https://github.com/takluyver/backcall
No license source files are provided from current version, however
upstream added one:
https://github.com/takluyver/backcall/blob/master/LICENSE
python-backcall is a runtime dependency of python-inotify 7.3.0
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
