public function startWrite($code)
{
if ($this->readOnly) {
return;
} elseif (!$code) {
throw new MWException(__METHOD__ . ": Invalid language \"{$code}\"");
}
$this->dbw = wfGetDB(DB_MASTER);
$this->readOnly = $this->dbw->isReadOnly();
$this->currentLang = $code;
$this->batch = [];
}