def cas(key, value, old_value):
    store = load()
    if key not in store:
        return False

    if store[key] != old_value:
        return False

    store[key] = value
    dump(store)
    return True
Deletes the file with the given ID from this job store. This operation is idempotent, i.e.
dataset/ETHPy150Open saltstack/salt/salt/modules/data.py/cas--crossover with--dataset/ETHPy150Open BD2KGenomics/toil/src/toil/jobStores/abstractJobStore.py/AbstractJobStore.deleteFile