public function getTicketArticles()
    {
        $this->clearError();

        if ( empty( $this->getID() ) ) {
            return [];
        }

        $ticket_articles = $this->getClient()->resource( ResourceType::TICKET_ARTICLE )->getForTicket( $this->getID() );
        if ( !is_array($ticket_articles) ) {
            $this->setError( $ticket_articles->getError() );
            return [];
        }

        return $ticket_articles;
    }