code: public String getResolvedValue(ParsedCommandLine parsedLine, boolean required) throws CommandFormatException {
          final String value = getOriginalValue(parsedLine, required);
          return resolveValue(value, initialState);
      }
docs: Calls getOriginalValue(ParsedCommandLine parsedLine, boolean required) and correctly
  handles escape sequences and resolves system properties.
  
  @param parsedLine  parsed command line
  @param required  whether the argument is required
  @return  resolved argument value
  @throws CommandFormatException  in case the required argument is missing