def __init__(self, to_notify):
        self._to_notify = to_notify
Creates Marathon's App (Docker instance).
dataset/ETHPy150Open serverdensity/sd-agent/checks/libs/thread_pool.py/AbstractResultCollector.__init__--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/PerfKitBenchmarker/perfkitbenchmarker/providers/mesos/mesos_docker_instance.py/MesosDockerInstance._CreateApp