def MarkForDeletion(self, urn):
    self.MultiMarkForDeletion([urn])
Periodic polling callback used by open_file() to find the newly-opened file
dataset/ETHPy150Open google/grr/grr/lib/aff4.py/DeletionPool.MarkForDeletion--crossover with--dataset/ETHPy150Open golang/sublime-build/dev/tests.py/when_file_opened