Disable address validation for known customer, in AcmePizzaBundle

disable address validation for known customer, in AcmePizzaBundle

<?php

    /**
     * @param  ExecutionContext $context
     * @return bool
     */
    public function isValidAddress($context)
    {
        if ($this->knownCustomer) {
            $this->address = $this->em->getRepository('AcmePizzaBundle:Address')->findOneBy(array('phone' => $this->knownPhone));
        } else {
            $context->getGraphWalker()->walkReference(
                $this->address,
                $context->getGroup(),
                $context->getPropertyPath() . ".address",
                true
            );
        }

        if (!($this->address instanceof Address)) {
            $context->addViolation('Invalid address given', array(), $this->address);
        }
    }