<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def toProtocolElement(self):
 """ Returns the representation of this ContinuousSet as the corresponding ProtocolElement. """

        gaContinuousSet = protocol.ContinuousSet()
        gaContinuousSet.id = self.getId()
        gaContinuousSet.dataset_id = self.getParentContainer().getId()
        gaContinuousSet.reference_set_id = pb.string(
                                            self._referenceSet.getId())
        gaContinuousSet.name = self._name
        gaContinuousSet.source_uri = self._sourceUri
        attributes = self.getAttributes()
        for key in attributes:
            gaContinuousSet.attributes.attr[key] \
                .values.extend(protocol.encodeValue(attributes[key]))
        return gaContinuousSet