Advice on how to achieve per-email-sent clicktracking toggle?

[estianross]

We have use cases where we need to be able to disable clicktracking on a per-email-sent basis and I'm struggling a bit on figuring out how to achieve that with our current sendgrid integration through this package.

I see in the tests provided there is support for sending extra headers but you don't use a header which makes sense outside of a test so that has me curious whether these extra headers supported includes the X-SMTPAPI header provided from sendgrid's SMTP API?
This should allow us to use the SMTP API settings filters on a per-email-sent basis if that is the case.