Marks a getter method or field as the date created time code (unix time code) for an entity,
this can be a
Date,
Long, long, or
String (will attempt to convert this to a long)
the convention is to try to convert the return from the
"getDateCreated" method or the value in the "dateCreated" field
NOTE: This annotation should only be used once in a class,
the getter method must take no arguments and return an object