def get_service_times(self, per_node_service_times):
        for task in self.__tasks.values():
            if task.node_monitor_address not in per_node_service_times:
                per_node_service_times[task.node_monitor_address] = []
            per_node_service_times[task.node_monitor_address].append(task.service_time())
Adds the service time for each node to the mapping of service times.
dataset/ETHPy150Open radlab/sparrow/src/main/python/parse_logs.py/Request.get_service_times