code: def convert_widgets(self):
          
          warnings.warn("Will be removed after dropping support for Django-1.10", PendingDeprecationWarning)
          widgets_module = getattr(self, 'widgets_module', 'djng.widgets')
          for field in self.base_fields.values():
              if hasattr(field, 'get_converted_widget'):
                  new_widget = field.get_converted_widget(widgets_module)
                  if new_widget:
                      field.widget = new_widget
docs: During form initialization, some widgets have to be replaced by a counterpart suitable to
          be rendered the AngularJS way.