pub unsafe extern "C" fn mrb_get_values_at( mrb: *mut mrb_state, obj: mrb_value, olen: mrb_int, argc: mrb_int, argv: *const mrb_value, func: Option<unsafe extern "C" fn(arg1: *mut mrb_state, arg2: mrb_value, arg3: mrb_int) -> mrb_value>) -> mrb_value
