Camspiers\StatisticalClassifier\DataSource\Json::write PHP Method

    public function write()
    {
        $data = array();
        foreach ($this->data as $category => $documents) {
            foreach ($documents as $document) {
                $data[] = array('category' => $category, 'document' => $document);
            }
        }
        file_put_contents($this->filename, json_encode($data));
    }