wxformbuilder doesn't add validators on textctrl to code

I'm trying to make some app using wxwidgets. I created a bit of GUI using wxformbuilder and now I want one of my textctrl to use numeric validator. I set it up in wxformbuilder like this:

So I made validator_type wxTextValidator, checked validator_style: wxFILTER_NUMERIC and unchecked wxFILTER_NONE. And set validator_data_type to wxString.

But it seems that there's no code related to validators in generated files. Here's all code that works with that textctrl:

m_textCtrl5 = new wxTextCtrl( m_panel9, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxTE_RIGHT );
fgSizer9->Add( m_textCtrl5, 0, wxALL|wxEXPAND, 5 );

I tried to make it earlier and I had the same problem. I generated inherited class and made it work by simply writing that validator code myself but I don't want to do the same thing now.

Am I doing something wrong or is this thing just not working?

To add a numeric validator, you also need to assign a string variable to hold the contents being validated. In wxFormbuilder you just need to fill in the "validator_variable" area like so: