Reading a PKPass in Swift

Is it possible to read the contents of a PKPass in Swift? I haven't been able to find a way to do this.

What I am doing:

• I go to the wallet
• I select a boarding pass
• I share the boarding pass to my app
• Using the share extension I try to read the PKPass

The following code gets me the PKPass but I cannot get its' contents:

    inputItems.forEach { item in
        if let attachments = item.attachments,
           !attachments.isEmpty {
            attachments.forEach { attachment in
                var imageType = "Nothing";
                if(attachment.hasItemConformingToTypeIdentifier("com.apple.pkpass")){
                    imageType = "com.apple.pkpass";
                }
                attachment.loadItem(forTypeIdentifier: imageType as String){dataPass,error in
                    if let pkPassData = dataPass as? Data,
                       let pkPass = try? PKPass(data: pkPassData){
                        let description = pkPass.description // Any property that reads the contents?
                        self.logger.log("Sharing a message \(description)")
                    }
                }

            }
        }
    }

So here I am getting the description. But what I want is all of the contents of the boarding pass that was shared with me. Any way I can read this?