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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 persist(self):
 """a private method that persists an estimator object to the filesystem"""

        if self.object_hash:
            data = dill.dumps(self.object_property)
            f = ContentFile(data)
            self.object_file.save(self.object_hash, f, save=False)
            f.close()
            self._persisted = True
        return self._persisted