phablet@ubuntu-phablet:~$ grep content /var/lib/apparmor/profiles/click_com.ubuntu.music_music_2.2.latest
  # a URL to open. This is most often used with content-hub providers and
  # Description: Can play audio (allows playing remote content via media-hub)
       name=com.ubuntu.content.handler.@{APP_ID_DBUS},
       path=/com/ubuntu/content/handler/@{APP_ID_DBUS}
       interface=com.ubuntu.content.dbus.Handler
       interface=com.ubuntu.content.dbus.Transfer
       interface=com.ubuntu.content.dbus.Service
  # content-hub will create hard links in ~/.cache/@{APP_PKGNAME}/HubIncoming/
  # this directory otherwise they would be able to change the source content.
  #  typically use the content_exchange policy group and API to access