D18025: Use the nicer K_PLUGIN_CLASS_WITH_JSON

[Albert Astals Cid]

aacid closed this revision.

REPOSITORY
  R114 Plasma Addons

REVISION DETAIL
  https://phabricator.kde.org/D18025

To: aacid, davidedmundson
Cc: plasma-devel, kvanton, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, 
ali-mohamed, jensreuterberg, abetts, sebas, apol, mart