/** * @return string */ function ToString() { $retval = ''; $lineStr = '--'; if ($this->List->Count() > 0) { $bound = $this->_parent->GetBoundary(); foreach ($this->List->Instance() as $mimePart) { $retval .= $lineStr . $bound . CRLF; $retval .= $mimePart->ToString() . CRLF; } $retval .= $lineStr . $this->_parent->GetBoundary() . $lineStr . CRLF; } return $retval; }