def __virtual__():
    return 'trafficserver' if 'trafficserver.set_var' in __salt__ else False
Return a set of services that are installed but disabled
dataset/ETHPy150Open saltstack/salt/salt/states/trafficserver.py/__virtual__--crossover with--dataset/ETHPy150Open saltstack/salt/salt/modules/debian_service.py/get_disabled