pub unsafe extern "C" fn rcl_clock_get_now(
clock: *mut rcl_clock_t,
time_point_value: *mut rcl_time_point_value_t,
) -> rcl_ret_tpub unsafe extern "C" fn rcl_clock_get_now(
clock: *mut rcl_clock_t,
time_point_value: *mut rcl_time_point_value_t,
) -> rcl_ret_t