A used car dealer sold an automobile to a customer (Robert) on an installment basis. The installment sales contract calls for Robert to make monthly payments of principal and interest. The contract also provides the dealer with a certificate of title, which gives the dealer a lien on the property. After Robert took possession of the car, he drove it to a local tire store to have all four tires replaced. Robert returned to pick up the car but refused to pay the bill. Consequently, the tire store owner retained possession of the car claiming his rights under an artisan’s lien theory. The tire store owner asserts that his artisan’s lien has priority over the dealer’s lien. Do you agree? Explain.