Action to enforce an arbitration clause. Franchise agreement. Allegation of connection with an action to annul the arbitration clause. "No connection is found, since, in principle, the court handling the evidentiary proceeding would not have jurisdiction to declare the nullity of an arbitration clause." "Precedent of the Superior Court of Justice (STJ) recognizing that, in the case of a 'full' arbitration clause (one that contains as a minimum element the designation of the institutional body for dispute resolution), state jurisdiction to examine the issue of the validity of the arbitration clause is excluded":