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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 toProtocolElement(self):
 """ Converts this VariantSet into its GA4GH protocol equivalent. """

        protocolElement = protocol.VariantSet()
        protocolElement.id = self.getId()
        protocolElement.dataset_id = self.getParentContainer().getId()
        protocolElement.reference_set_id = self._referenceSet.getId()
        protocolElement.metadata.extend(self.getMetadata())
        protocolElement.dataset_id = self.getParentContainer().getId()
        protocolElement.reference_set_id = self._referenceSet.getId()
        protocolElement.name = self.getLocalId()
        self.serializeAttributes(protocolElement)
        return protocolElement