We're working on our transition from Classic to Lightning. I am creating email templates in Lightning and see that we have to choose a merge field from the picker. I am able to find almost all of the merge fields we use in Classic in the list. However, we have a merge field in Classic that I can't seem to set up in Lightning. In Classic, we have {!NullValue(Contact.FirstName, "Customer")}. If the object First Name has no value, we want to use the word "Customer" as the greeting on our email. Is it possible to set that up in Lightning? Thanks in advance!