File

util.pubsub: Signal that 'persistent-items' is unsupported when disabled XEP-0060 says that this the way to indicate that 'persistent-items' is unsupported, but doesn't explicitly say if it being disabled in the node configuration also counts as unsupported.

local record mod
	sand : function (string, string) : string
	sor : function (string, string) : string
	sxor : function (string, string) : string
end
return mod