public function getIndexMappedAdditionalFieldNames($defaultIfEmpty = [])
    {
        $mappingConfiguration = $this->getIndexAdditionalFieldsConfiguration();
        $mappedFieldNames = $this->getOnlyArrayKeysWhereValueIsNotAnArray($mappingConfiguration);
        return count($mappedFieldNames) == 0 ? $defaultIfEmpty : $mappedFieldNames;
    }
public function getIndexMappedAdditionalFieldNames($defaultIfEmpty = [])
    {
        $mappingConfiguration = $this->getIndexAdditionalFieldsConfiguration();
        $mappedFieldNames = $this->getOnlyArrayKeysWhereValueIsNotAnArray($mappingConfiguration);
        return count($mappedFieldNames) == 0 ? $defaultIfEmpty : $mappedFieldNames;
    }
public function getIndexMappedAdditionalFieldNames ( $ defaultIfEmpty = [ ] ) { $ mappingConfiguration = $ this -> getIndexAdditionalFieldsConfiguration ( ) ; $ mappedFieldNames = $ this -> getOnlyArrayKeysWhereValueIsNotAnArray ( $ mappingConfiguration ) ; return count ( $ mappedFieldNames ) == 0 ? $ defaultIfEmpty : $ mappedFieldNames ; }
Returns all solr fields names where a mapping is configured in index.additionalFields

Returns all keys from
plugin.tx_solr.index.additionalFields.

@param array $defaultIfEmpty
@return array
Returns all solr fields names where a mapping is configured in index . additionalFields