def convertValue(self, dbType, dataType, typeCode, value):
        raise NotImplementedError(
            "convertValue must be implemented by sub-class")
Returns a cached Model instance given the entity key if available.
dataset/ETHPy150Open Teradata/PyTd/teradata/datatypes.py/DataTypeConverter.convertValue--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/ndb/context.py/Context._load_from_cache_if_available