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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def populateFromRow(self, quantificationSetRecord):
 """ Populates the instance variables of this RnaQuantificationSet from the specified DB row. """

        self._dbFilePath = quantificationSetRecord.dataurl
        self.setAttributesJson(quantificationSetRecord.attributes)
        self._db = SqliteRnaBackend(self._dbFilePath)
        self.addRnaQuants()