pub unsafe extern "C" fn lv_chart_set_next_value(
obj: *mut lv_obj_t,
ser: *mut lv_chart_series_t,
value: lv_coord_t,
)pub unsafe extern "C" fn lv_chart_set_next_value(
obj: *mut lv_obj_t,
ser: *mut lv_chart_series_t,
value: lv_coord_t,
)