def visit(self, function, combinator):
        return combinator([function(self.first), function(self.second)])
Services should 400 without a description
dataset/ETHPy150Open nltk/nltk/nltk/sem/logic.py/BinaryExpression.visit--crossover with--dataset/ETHPy150Open twilio/stashboard/tests/test_service_lists.py/ServiceListTest.test_missing_service_description