original_string: protected static function decode($body, $encoding)
      {
          if (ENCQUOTEDPRINTABLE === $encoding) {
              return quoted_printable_decode($body);
          }
  
          if (ENCBASE64 === $encoding) {
              return base64_decode($body);
          }
  
          return $body;
      }
code: protected static function decode($body, $encoding)
      {
          if (ENCQUOTEDPRINTABLE === $encoding) {
              return quoted_printable_decode($body);
          }
  
          if (ENCBASE64 === $encoding) {
              return base64_decode($body);
          }
  
          return $body;
      }
code_tokens: protected static function decode ( $ body , $ encoding ) { if ( ENCQUOTEDPRINTABLE === $ encoding ) { return quoted_printable_decode ( $ body ) ; } if ( ENCBASE64 === $ encoding ) { return base64_decode ( $ body ) ; } return $ body ; }
docstring: Decode the body text
  
  @param  string $body
  @param  int $encoding
  @return string
docstring_tokens: Decode the body text