def AddFormatter(self, formatter):
    self.formatters.append(formatter)
Generate exception for unhandled requests.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/_internal/graphy/common.py/BaseChart.AddFormatter--crossover with--dataset/ETHPy150Open sigmavirus24/betamax/betamax/adapter.py/unhandled_request_message