/**
  * @param RecordEntity[] $records
  */
 public function getDataFromRecords($records)
 {
     $person_names = ['First name', 'Middle name', 'Last name'];
     $field_names = Field::getFieldNames();
     $headers = array_merge($person_names, $field_names);
     $headers = array_merge($headers, ['activities']);
     $recordData = [];
     foreach ($records as $record) {
         if (!empty($record)) {
             $row = $this->getRecordDataAsArray($record);
             if (!empty($row)) {
                 $recordData[] = $row;
             }
         }
     }
     $this->sendXML('people', $headers, $recordData, SORT_NATURAL);
 }