TTMSFMXNativeUITableView toolbar back button click event

We are usingTMS iCL 4.0.0.0. In our iOS app we have a TTMSFMXNativeUITableView component with property Options.Toolbar set to true. How can we detect whether the back button in the toolbar has been pressed?

This is currently not possible. The only solution so far is programmatically creating a UIBarButtonItem, replacing the default back button in the navigationcontroller, and then capture the delegate and click event. We don't have a sample right now unfortunately