hasOpenSession A Boolean value that indicates whether the device has an open session. Declarationvar hasOpenSession: Bool { get } See AlsoManaging a DevicedelegateICDeviceDelegaterequestOpenSession()requestOpenSession(options:completion:)requestSendMessage(_:outData:maxReturnedDataSize:sendMessageDelegate:didSendMessageSelector:contextInfo:)requestCloseSession()requestCloseSession(options:completion:)requestEject()requestEject(completion:)