Наследование: extends eZ\Publish\Core\FieldType\RichText\Converter\Xslt
 /**
  * Method for parsing ezrichtext field.
  *
  * @param \eZ\Publish\API\Repository\Values\Content\Field $field
  *
  * @return string
  */
 public function ezrichtext(Field $field)
 {
     return '<![CDATA[' . $this->richHtml5Converter->convert($field->value->xml)->saveHTML() . ']]>';
 }