Oh interesting. So, how do you figure out where to send which data? Like say, I want to track an event on Google Analytics where I want to see if a new user is being redirected to my site from another site based on the Referer header(no idea if this is a valid use case for GA, its just something I have implemented for one of my projects), how would rudder figure out where to send that data? Does the User have to give a list of events that they want to be sent to GA? Or do I have to specify that I want an event to be sent to GA every time I call Rudder api?