def Append(self, entry):
    assert self._output is not None
    self._buffer.append(entry)
Test if no duplicate tags are saved in the database
dataset/ETHPy150Open viewfinderco/viewfinder/backend/logs/log_merger.py/LocalLogMerge.Append--crossover with--dataset/ETHPy150Open eugenkiss/Simblin/test/test_models.py/TestTags.test_tag_uniqueness