(self)
If even 1-2 OT cannot be performed, make failure response
        :return:
If even 1-2 OT cannot be performed, make failure response
        :return:
If even 1 - 2 OT cannot be performed make failure response : return :
def _failure_response(self):
        """
        If even 1-2 OT cannot be performed, make failure response
        :return:
        """
        raise ValueError("Cannot perform even 1-2 OT, recommend use raw retrieval")
def _failure_response ( self ) : raise ValueError ( "Cannot perform even 1-2 OT, recommend use raw retrieval" )