In a putative class action on behalf of all California self-funded payors, alleging that defendant's various written and oral contracts with network vendors, such as Blue Shield, contain anticompetitive terms that insulate it from competition and drive up the cost of healthcare, and seeking damages, restitution and injunctive relief under the Cartwright Act, Bus. null; Prof. Code section 16720 et seq., and California's unfair competition law (UCL), the trial court's denial of defendant's motion to compel arbitration of the complaint, relying on an arbitration clause in the provider contract signed by defendant and Blue Shield, is affirmed where plaintiff was not bound to arbitrate its claims pursuant to an agreement it had not signed or even seen.