+ Grob *grob = 0;
+
+ SCM handle = scm_sloppy_assq (ly_symbol2scm ("meta"), props);
+ SCM klass = scm_cdr (scm_sloppy_assq (ly_symbol2scm ("class"), scm_cdr (handle)));
+
+ if (scm_is_eq (klass, ly_symbol2scm ("Item")))
+ grob = new Item (props);
+ else if (scm_is_eq (klass, ly_symbol2scm ("Spanner")))
+ grob = new Spanner (props);
+ else if (scm_is_eq (klass, ly_symbol2scm ("Paper_column")))
+ grob = new Paper_column (props);
+
+ assert (grob);
+ announce_grob (grob, cause);
+
+#ifdef DEBUG
+ if (ly_is_procedure (creation_callback))
+ scm_call_4 (creation_callback,
+ grob->self_scm (), scm_from_utf8_string (file),
+ scm_from_int (line), scm_from_ascii_string (fun));
+#endif
+
+ return grob;