original_string: private static function decodeContent($content, $encoding) {
      switch (strtolower($encoding)) {
        case 'base64':
          return base64_decode($content);
        case 'quoted-printable':
          return quoted_printable_decode($content);
        default:
          return $content;
      }
    }
code: private static function decodeContent($content, $encoding) {
      switch (strtolower($encoding)) {
        case 'base64':
          return base64_decode($content);
        case 'quoted-printable':
          return quoted_printable_decode($content);
        default:
          return $content;
      }
    }
code_tokens: private static function decodeContent ( $ content , $ encoding ) { switch ( strtolower ( $ encoding ) ) { case 'base64' : return base64_decode ( $ content ) ; case 'quoted-printable' : return quoted_printable_decode ( $ content ) ; default : return $ content ; } }
docstring: Decoded content based on the encoding scheme.
  
  @param string $content The content to be decoded.
  @param string $scheme The encoding shceme used. Currently only supports
  'base64' and 'quoted-printable'.
  @return string The deocded content if the encoding scheme is supported,
  otherwise returns the original content.
docstring_tokens: Decoded content based on the encoding scheme .