public function write($output)
{
$xfer = 0;
$xfer += $output->writeStructBegin('Cassandra_describe_ring_args');
if ($this->keyspace !== null) {
$xfer += $output->writeFieldBegin('keyspace', TType::STRING, 1);
$xfer += $output->writeString($this->keyspace);
$xfer += $output->writeFieldEnd();
}
$xfer += $output->writeFieldStop();
$xfer += $output->writeStructEnd();
return $xfer;
}