question: public void addCommands ( PDFPage page , Matrix extra ) { synchronized ( commands ) { addPush ( ) ; if ( extra != null ) { addXform ( extra ) ; } commands . addAll ( page . getCommands ( ) ) ; addPop ( ) ; } updateImages ( ) ; }
target:  add a collection of commands to the page list.  This is probably invoked as the result of an XObject 'do' command, or through a type 3 font.