$this->errorFallback->initPrinter( $unused );
if ( $this->mFailWithHTTPError ) {
$this->getMain()->getRequest()->response()->statusHeader( 400 );
$this->errorFallback->initPrinter( $unused );
if ( $this->mFailWithHTTPError ) {
$this->getMain()->getRequest()->response()->statusHeader( 400 );