gui_set_line_spacing 1676 src/frame.h    extern void gui_set_line_spacing (struct frame *, Lisp_Object, Lisp_Object);
gui_set_line_spacing 3131 src/haikufns.c     gui_set_line_spacing,
gui_set_line_spacing  982 src/pgtkfns.c      gui_set_line_spacing,	/* generic OK, sets f->extra_line_spacing to int */
gui_set_line_spacing 10551 src/w32fns.c     gui_set_line_spacing,
gui_set_line_spacing 9833 src/xfns.c       gui_set_line_spacing,