/**
  * Check whether the given object is meant to include files in some fields.
  *
  * @param Content $object
  * @return void
  */
 protected function checkWhetherObjectMayIncludeFiles(Content $object)
 {
     if (Tca::grid($object->getDataType())->areFilesIncludedInExport()) {
         foreach ($object->toFields() as $fieldName) {
             $fieldType = Tca::table($object->getDataType())->field($fieldName)->getType();
             if ($fieldType === FieldType::FILE) {
                 $this->fileTypeProperties[] = GeneralUtility::camelCaseToLowerCaseUnderscored($fieldName);
             }
         }
     }
 }