original_string: protected function _toSequenceString($sort = true)
      {
          /* $sort is ignored - see _sort(). */
  
          /* Use space as delimiter as it is the only printable ASCII character
           * that is not allowed as part of the UID (RFC 1939 [7]). */
          return implode(' ', count($this->_ids) > 25000 ? array_unique($this->_ids) : array_keys(array_flip($this->_ids)));
      }
code: protected function _toSequenceString($sort = true)
      {
          /* $sort is ignored - see _sort(). */
  
          /* Use space as delimiter as it is the only printable ASCII character
           * that is not allowed as part of the UID (RFC 1939 [7]). */
          return implode(' ', count($this->_ids) > 25000 ? array_unique($this->_ids) : array_keys(array_flip($this->_ids)));
      }
code_tokens: protected function _toSequenceString ( $ sort = true ) { /* $sort is ignored - see _sort(). */ /* Use space as delimiter as it is the only printable ASCII character
           * that is not allowed as part of the UID (RFC 1939 [7]). */ return implode ( ' ' , count ( $ this -> _ids ) > 25000 ? array_unique ( $ this -> _ids ) : array_keys ( array_flip ( $ this -> _ids ) ) ) ; }
docstring: Create a POP3 message sequence string.
  
  Index Format: UID1[SPACE]UID2...
  
  @param boolean $sort  Not used in this class.
  
  @return string  The POP3 message sequence string.
docstring_tokens: Create a POP3 message sequence string .