LGSTRING_ID       735 src/composite.c   if (! NILP (LGSTRING_ID (gstring)) && ! FIXNATP (LGSTRING_ID (gstring)))
LGSTRING_ID       984 src/composite.c   if (NILP (LGSTRING_ID (lgstring)))
LGSTRING_ID      1393 src/composite.c       if (NILP (LGSTRING_ID (lgstring)))
LGSTRING_ID      1395 src/composite.c       cmp_it->id = XFIXNUM (LGSTRING_ID (lgstring));
LGSTRING_ID      4333 src/font.c       if (! NILP (LGSTRING_ID (gstring)))