Observer/InitiateCheckout.php [21:61]:
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    protected $fbeHelper;

    /**
     * @var MagentoDataHelper
     */
    protected $magentoDataHelper;

    /**
     * @var ServerSideHelper
     */
    protected $serverSideHelper;

    /**
     * InitiateCheckout constructor
     *
     * @param FBEHelper $fbeHelper
     * @param MagentoDataHelper $magentoDataHelper
     * @param ServerSideHelper $serverSideHelper
     */
    public function __construct(
        FBEHelper $fbeHelper,
        MagentoDataHelper $magentoDataHelper,
        ServerSideHelper $serverSideHelper
    ) {
        $this->fbeHelper = $fbeHelper;
        $this->magentoDataHelper = $magentoDataHelper;
        $this->serverSideHelper = $serverSideHelper;
    }

    /**
     * Execute action method for the Observer
     *
     * @param Observer $observer
     * @return  $this
     */
    public function execute(Observer $observer)
    {
        try {
            $eventId = $observer->getData('eventId');
            $customData = [
                'currency'     => $this->magentoDataHelper->getCurrency(),
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Observer/Purchase.php [21:61]:
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    protected $fbeHelper;

    /**
     * @var MagentoDataHelper
     */
    protected $magentoDataHelper;

    /**
     * @var ServerSideHelper
     */
    protected $serverSideHelper;

    /**
     * Purchase constructor
     *
     * @param FBEHelper $fbeHelper
     * @param MagentoDataHelper $magentoDataHelper
     * @param ServerSideHelper $serverSideHelper
     */
    public function __construct(
        FBEHelper $fbeHelper,
        MagentoDataHelper $magentoDataHelper,
        ServerSideHelper $serverSideHelper
    ) {
        $this->fbeHelper = $fbeHelper;
        $this->magentoDataHelper = $magentoDataHelper;
        $this->serverSideHelper = $serverSideHelper;
    }

    /**
     * Execute action method for the Observer
     *
     * @param Observer $observer
     * @return  $this
     */
    public function execute(Observer $observer)
    {
        try {
            $eventId = $observer->getData('eventId');
            $customData = [
                'currency'     => $this->magentoDataHelper->getCurrency(),
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