def negate(self):
        self.negated = not self.negated
get logs provided by "docker build"
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Django-1.6.10/django/utils/tree.py/Node.negate--crossover with--dataset/ETHPy150Open projectatomic/osbs-client/osbs/api.py/OSBS.get_docker_build_logs