Append a :class:`Inflation
        <stellar_base.operation.Inflation>` operation to the list of
        operations.

        :param str source: The source address that is running the inflation
            operation.
        :return: This builder instance.

def append_inflation_op(self, source=None):
        """Append a :class:`Inflation
        <stellar_base.operation.Inflation>` operation to the list of
        operations.

        :param str source: The source address that is running the inflation
            operation.
        :return: This builder instance.

        """
        op = operation.Inflation(source)
        return self.append_op(op)