def get_language_code(self):
        raise NotImplementedError("Subclasses of CommCareMobileContactMixin must implement method get_language_code().")
The percentage of interactions the user had at night.
dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/sms/mixin.py/CommCareMobileContactMixin.get_language_code--crossover with--dataset/ETHPy150Open yvesalexandre/bandicoot/bandicoot/individual.py/percent_nocturnal