original_string: protected static function _decodeFromDER(Identifier $identifier,
          string $data, int &$offset): ElementBase
      {
          throw new \BadMethodCallException(
              __METHOD__ . " must be implemented in derived class.");
      }
code: protected static function _decodeFromDER(Identifier $identifier,
          string $data, int &$offset): ElementBase
      {
          throw new \BadMethodCallException(
              __METHOD__ . " must be implemented in derived class.");
      }
code_tokens: protected static function _decodeFromDER ( Identifier $ identifier , string $ data , int & $ offset ) : ElementBase { throw new \ BadMethodCallException ( __METHOD__ . " must be implemented in derived class." ) ; }
docstring: Decode type-specific element from DER.
  
  @param Identifier $identifier Pre-parsed identifier
  @param string $data DER data
  @param int $offset Offset in data to the next byte after identifier
  @throws DecodeException If decoding fails
  @return ElementBase
docstring_tokens: Decode type - specific element from DER .