def METHOD_NAME(self, x):
    try:
        self.pack_uint(x>>32 & 0xffffffffL)
    except (TypeError, struct.error) as e:
        raise ConversionError(e.args[0])
    try:
        self.pack_uint(x & 0xffffffffL)
    except (TypeError, struct.error) as e:
        raise ConversionError(e.args[0])