+ Spanner *sp = dynamic_cast<Spanner *> (me);
+ if (! (sp->get_bound (LEFT) && sp->get_bound (RIGHT)))
+ {
+ programming_error ("Multi_measure_rest::get_rods (): I am not spanned!");
+ return SCM_UNSPECIFIED;
+ }
+
+ Item *li = sp->get_bound (LEFT)->get_column ();
+ Item *ri = sp->get_bound (RIGHT)->get_column ();
+ Item *lb = li->find_prebroken_piece (RIGHT);
+ Item *rb = ri->find_prebroken_piece (LEFT);
+
+ Item *combinations[4][2] = {{li, ri},
+ {lb, ri},
+ {li, rb},
+ {lb, rb}};
+
+ Stencil *stil = me->get_stencil ();
+
+ /* FIXME uncached */
+ Real len = (stil && !stil->extent (X_AXIS).is_empty ())
+ ? stil->extent (X_AXIS).length ()
+ : 0.0;
+
+ for (int i = 0; i < 4; i++)
+ {
+ Item *li = combinations[i][0];
+ Item *ri = combinations[i][1];
+
+ if (!li || !ri)
+ continue;