delimiters "$", "$"
activate(person) ::= <<$person.personFirstName$>>

Person _thePerson = //fetched from database
STGroup group = new STGroupFile(/tmp/email.stg);
ST st = group.getInstanceOf("activate");
st.add("person", _thePerson);
System.out.println("the person first name is: " + _thePerson.personFirstName());
System.out.println(st.render());

the person first name is: Ivan
<nothing is returned here>

activate(person) ::= <<$person$>>

the person first name is: Ivan
999999999 - Johnson, Ivan G