[[!comment format=mdwn
 username="joey"
 subject="""comment 1"""
 date="2017-08-31T22:26:42Z"
 content="""
`withOS` or `getOS` is often used to deal with such differences,
varying behavior depending on the Host's defined OS. For example, 
Propellor.Property.Borg.installed does one thing on Debian jessie
and another thing on other versions of Debian. And
Propellor.Property.Apt.getMirror generates different urls for Debian and
Ubuntu.
"""]]
