ᱢᱳᱰᱩᱞ:Is infobox in lead/doc

Usage

{{#invoke:Is infobox in lead|main|[Ii]nfobox [Ff]oo [Bb]ar}}

This module checks if Infobox foo bar is in the lead, is also the only infobox in the lead, and that there aren't two of that same infobox in the article. If that is the case, it returns true, and if not returns nothing.