pub unsafe extern "C" fn UA_Client_Subscriptions_create_async(
client: *mut UA_Client,
request: UA_CreateSubscriptionRequest,
subscriptionContext: *mut c_void,
statusChangeCallback: UA_Client_StatusChangeNotificationCallback,
deleteCallback: UA_Client_DeleteSubscriptionCallback,
callback: UA_ClientAsyncServiceCallback,
userdata: *mut c_void,
requestId: *mut UA_UInt32,
) -> UA_StatusCode