original_string: protected function _getContentTransferEncoding()
      {
          if ($this->transferEncoding) {
              return $this->transferEncoding;
          }
  
          $charset = strtoupper($this->charset);
          if (in_array($charset, $this->_charset8bit)) {
              return '8bit';
          }
  
          return '7bit';
      }
code: protected function _getContentTransferEncoding()
      {
          if ($this->transferEncoding) {
              return $this->transferEncoding;
          }
  
          $charset = strtoupper($this->charset);
          if (in_array($charset, $this->_charset8bit)) {
              return '8bit';
          }
  
          return '7bit';
      }
code_tokens: protected function _getContentTransferEncoding ( ) { if ( $ this -> transferEncoding ) { return $ this -> transferEncoding ; } $ charset = strtoupper ( $ this -> charset ) ; if ( in_array ( $ charset , $ this -> _charset8bit ) ) { return '8bit' ; } return '7bit' ; }
docstring: Return the Content-Transfer Encoding value based
  on the set transferEncoding or set charset.
  
  @return string
docstring_tokens: Return the Content - Transfer Encoding value based on the set transferEncoding or set charset .