pub unsafe extern "C" fn rcl_action_wait_set_add_action_client(
wait_set: *mut rcl_wait_set_t,
action_client: *const rcl_action_client_t,
client_index: *mut usize,
subscription_index: *mut usize,
) -> rcl_ret_tpub unsafe extern "C" fn rcl_action_wait_set_add_action_client(
wait_set: *mut rcl_wait_set_t,
action_client: *const rcl_action_client_t,
client_index: *mut usize,
subscription_index: *mut usize,
) -> rcl_ret_t