Forum:Subst only warning template?

Is there a subst only warning template on Templates, or on the Starter? Something like Wikipedia's wikipedia:en:template:subst only would be quite useful to have on all Wikia wikis when building substitution templates (like subst boilerplates) as part of documenting the template, instead of having to build custom warnings on each wiki. ForestMonthZero 12:06, December 22, 2011 (UTC)