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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 update_record(self, identifier, rtype=None, name=None, content=None, **kwargs):
 """ Update a record. Identifier must be specified. """

        if not rtype and kwargs.get('type'):
            warnings.warn('Parameter "type" is deprecated, use "rtype" instead.',
                          DeprecationWarning)
            rtype = kwargs.get('type')

        return self._update_record(identifier, rtype=rtype, name=name, content=content)