* Subtitle::BASE : function prototypes

lib/Subtitle/BASE.pm

@@ -73,4 +73,7 @@ sub events {
   return wantarray ? @{ $self->{events} } : $self->{events};
 }
 
+sub parse { return "Unimplemented by subclass"; }
+sub build { return "Unimplemented by subclass"; }
+
 1;