def __init__(self, memory=None, cores=None, disk=None, preemptable=None):
            self.memory = memory
            self.cores = cores
            self.disk = disk
            self._childServices = []
            self._hasParent = False
            self.preemptable = preemptable
The ``{% if %}`` tag evaluates a variable, and if that variable is "true"
dataset/ETHPy150Open BD2KGenomics/toil/src/toil/job.py/Job.Service.__init__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/template/defaulttags.py/do_if