docs: def get_form(self, step=None, data=None, files=None):
          """Instanciate the form for the current step
  
          FormAdminView from xadmin expects form to be at self.form_obj
  
          """
          self.form_obj = super(FormWizardAdminView, self).get_form(
              step=step, data=data, files=files)
          return self.form_obj