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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 tune(self):
 """XML node representing tune."""

        if self._node.get('activities'):
            tune = self._node['activities'].get('tune')
            if type(tune) is collections.OrderedDict:
                return tune
            elif type(tune) is list:
                return tune[0]
            return tune
        return None