public function getBinary()
    {
        /** @noinspection IsEmptyFunctionUsageInspection */
        if (empty($this->getData('binary'))) {
            
            $attachmentBinary = file_get_contents(
                $this->getFilePath()
            );            

            $this->setData(
                'binary',
                $attachmentBinary
            );
        }

        return $this->getData('binary');
    }