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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 addFeatureSet(self, featureSet):
 """ Adds the specified featureSet to this dataset. """

        id_ = featureSet.getId()
        self._featureSetIdMap[id_] = featureSet
        self._featureSetIds.append(id_)
        name = featureSet.getLocalId()
        self._featureSetNameMap[name] = featureSet