pub unsafe extern "C" fn lv_draw_label_iterate_characters(
t: *mut _lv_draw_task_t,
dsc: *const lv_draw_label_dsc_t,
coords: *const lv_area_t,
cb: Option<unsafe extern "C" fn(*mut _lv_draw_task_t, *mut _lv_draw_glyph_dsc_t, *mut lv_draw_fill_dsc_t, *const lv_area_t)>,
)