Return a list of parameters in this task's request.

        If self.request is already a list, simply return it.

        If self.request is a raw XML-RPC string, parse it and return the
        params.

def params(self):
        """
        Return a list of parameters in this task's request.

        If self.request is already a list, simply return it.

        If self.request is a raw XML-RPC string, parse it and return the
        params.
        """
        if isinstance(self.request, list):
            return unmunchify(self.request)
        (params, _) = xmlrpc.loads(self.request)
        return params