docs: public static SubstitutedLine parseOperationRequestLine(String commandLine,
              final CommandLineParser.CallbackHandler handler, CommandContext ctx) throws CommandFormatException {
          if (commandLine == null) {
              return null;
          }
          final ParsingStateCallbackHandler callbackHandler = getCallbackHandler(handler);
          handler.setFormat(OperationFormat.INSTANCE);
          return StateParser.parseLine(commandLine, callbackHandler, OperationRequestState.INSTANCE, ctx);
      }