Send data to another app and get response from it

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I'm trying to communicate apps with each other.

I'm handling Apple Events in my first application with

NSAppleEventManager.shared().setEventHandler(self, andSelector: #selector(handleGetURLEvent), forEventClass: AEEventClass(kInternetEventClass), andEventID: AEEventID(kAEGetURL))

func handleGetURLEvent(_ event: NSAppleEventDescriptor, withReplyEvent replyEvent: NSAppleEventDescriptor)

In the second app I'm creating NSAppleEventDescriptor object

let test = NSAppleEventDescriptor(string: "test")
let descriptor = NSAppleEventDescriptor(eventClass: AEEventClass(kInternetEventClass), eventID: AEEventID(kAEGetURL), targetDescriptor: nil, returnID: AEReturnID(kAutoGenerateReturnID), transactionID: AETransactionID(kAnyTransactionID))
descriptor.setParam(test, forKeyword: keyDirectObject)

Now with NSWorkspace I'm launching my first app

NSWorkspace.shared().launchApplication(at: myAppUrl, options: .default, configuration: [NSWorkspaceLaunchConfigurationAppleEvent:descriptor])

Everything is ok, function handleGetURLEvent is called, but... replyEvent.desciptorType is kAENullEvent also I don't have clue how would I get replyEvent in my second app.

I suppose there is something wrong with this solution.

So my question is how can I simply send data to my other app and get some data back?

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