Has anyone found a solution to this?I understand you can enable Google Analytics in two ways in Shopify:1. Specify Google Analytics ID in Online Store / Preferences / Google Analytics section in Shopify Admin.2. Inject Google Analytics tracking code ...

Hi T_8, We have faced the same issue: needed to pass some data from cart page to CarrierService callback. The only solution we found so far was this: you can write some AJAX code to add your custom data as products "line item properties" on cart page...