original_string: public function listIdentifiers($metadataPrefix, $from = null, $until = null, $set = null, $resumptionToken = null)
      {
          return $this->createRecordIterator("ListIdentifiers", $metadataPrefix, $from, $until, $set, $resumptionToken);
      }
code: public function listIdentifiers($metadataPrefix, $from = null, $until = null, $set = null, $resumptionToken = null)
      {
          return $this->createRecordIterator("ListIdentifiers", $metadataPrefix, $from, $until, $set, $resumptionToken);
      }
code_tokens: public function listIdentifiers ( $ metadataPrefix , $ from = null , $ until = null , $ set = null , $ resumptionToken = null ) { return $ this -> createRecordIterator ( "ListIdentifiers" , $ metadataPrefix , $ from , $ until , $ set , $ resumptionToken ) ; }
docstring: List Record identifiers
  
  Corresponds to OAI Verb to list record identifiers
  
  @param  string             $metadataPrefix Required by OAI-PMH endpoint
  @param  \DateTimeInterface $from             An optional 'from' date for selective harvesting
  @param  \DateTimeInterface $until            An optional 'until' date for selective harvesting
  @param  string             $set              An optional setSpec for selective harvesting
  @param  string             $resumptionToken  An optional resumptionToken for selective harvesting
  @return RecordIteratorInterface
docstring_tokens: List Record identifiers