throw new MWException(
"Cannot pop '{$this->type}' job off foreign '{$this->domain}' wiki queue." );
} elseif ( !isset( $wgJobClasses[$this->type] ) ) {
throw new MWException(
"Cannot pop '{$this->type}' job off foreign '{$this->domain}' wiki queue." );
} elseif ( !isset( $wgJobClasses[$this->type] ) ) {