The Sendgrid template + merge-variable payload accepted by
EmailNotificationSender.send. This is the shape a writer's
<Domain>NotificationService builds and hands to the notification core.
Derived from send so it stays in sync with the template union above.
The Sendgrid template + merge-variable payload accepted by EmailNotificationSender.send. This is the shape a writer's
<Domain>NotificationServicebuilds and hands to the notification core.Derived from
sendso it stays in sync with the template union above.