/**
* @param DataField $field
*
* @return string
*/
private function convertDataField(DataField $field)
{
$subFields = array_map(function (SubField $subField) {
return $this->convertSubField($subField);
}, $field->getSubFields());
return (string) implode($field->getIndicators()) . implode($subFields) . File_MARC::END_OF_FIELD;
}
