def _intercept_msg_in(self, inv):
        inv_one = EndpointUnit._intercept_msg_in(self, inv)
        inv_two = process_interceptors(self.interceptors["process_incoming"] if "process_incoming" in self.interceptors else [], inv_one)
        return inv_two
list or KeyedList of ``Data`` : Data definitions
dataset/ETHPy150Open ooici/pyon/pyon/ion/endpoint.py/ProcessEndpointUnitMixin._intercept_msg_in--crossover with--dataset/ETHPy150Open wrobstory/vincent/vincent/visualization.py/Visualization.data