(cls)
This method should return a subclass of corehq.apps.sms.forms.BackendForm
This method should return a subclass of corehq.apps.sms.forms.BackendForm
This method should return a subclass of corehq . apps . sms . forms . BackendForm
def get_form_class(cls):
        """
        This method should return a subclass of corehq.apps.sms.forms.BackendForm
        """
        raise NotImplementedError("Please implement this method")
def get_form_class ( cls ) : raise NotImplementedError ( "Please implement this method" )