root@juju-client:~# snap info juju
name:      juju
summary:   "juju client"
publisher: canonical
contact:   http://jujucharms.com
description: |
  Through the use of charms, juju provides you with shareable, re-usable, and
  repeatable expressions of devops best practices.
commands:
  - juju
tracking:    edge
installed:   2.3-alpha1+develop-1fa72fd (2238) 43MB classic
refreshed:   2017-07-28 08:24:24 +0000 UTC
channels:
  stable:    2.2.2                      (2142) 25MB classic
  candidate: 2.2.2                      (2142) 25MB classic
  beta:      2.2.3+2.2-073a7f1          (2220) 43MB classic
  edge:      2.3-alpha1+develop-2393529 (2249) 42MB classic
root@juju-client:~# snap refresh --edge juju
error: cannot refresh "juju": snap "juju" has changes in progress
root@juju-client:~# snap remove juju
error: cannot remove "juju": snap "juju" has changes in progress