def serialize(self, value):
        if value is None:
            return u''
        elif self.strip:
            return unicode(value).strip()
        else:
            return unicode(value)
Retrieves a sub scan node based on the location.
dataset/ETHPy150Open jek/flatland/flatland/schema/scalars.py/String.serialize--crossover with--dataset/ETHPy150Open log2timeline/dfvfs/dfvfs/helpers/source_scanner.py/SourceScanNode.GetSubNodeByLocation