+Output_def *get_paper (Lily_parser *parser);
+void init_papers (Lily_parser *parser);
+void push_paper (Lily_parser *parser, Output_def *paper);
+void pop_paper (Lily_parser *parser);
+void set_paper (Lily_parser *parser, Output_def *paper);
+SCM get_header (Lily_parser *parser);