}
    }

    /**
     * Returns all buffered lines as a single string, separated by newlines.
     *
     * @return the concatenated output of all buffered lines
     */
    public String getOutput() {
        final StringBuilder buf = new StringBuilder(100);
        for (final String value : list) {
            buf.append(value).append("\n");
        }
        return buf.toString();
    }

    /**

    }

    @ParametricNullness
    abstract T getOutput(int entry);

    @Override
    @ParametricNullness
    public T next() {
      checkForConcurrentModification();
      if (!hasNext()) {
        throw new NoSuchElementException();
      }
      indexToRemove = currentIndex;
      T result = getOutput(currentIndex);
      currentIndex = getSuccessor(currentIndex);

            final int exitValue = currentProcess.exitValue();

            if (logger.isInfoEnabled()) {
                logger.info("Crawler: Exit Code={} - Process Output:\n{}", exitValue, it.getOutput());
            }
            if (exitValue != 0) {
                final StringBuilder out = new StringBuilder();
                if (processTimeout) {

        assertEquals(1, stemmerOverrideItem.getId());
        assertEquals("aaa", stemmerOverrideItem.getInput());
        assertEquals("a", stemmerOverrideItem.getOutput());
        assertNull(stemmerOverrideItem.getNewInput());
        assertNull(stemmerOverrideItem.getNewOutput());
        assertFalse(stemmerOverrideItem.isUpdated());
        assertFalse(stemmerOverrideItem.isDeleted());

            final int exitValue = currentProcess.exitValue();

            if (logger.isInfoEnabled()) {
                logger.info("Python: Exit Code={} - Process Output:\n{}", exitValue, it.getOutput());
            }
            if (exitValue != 0) {
                final StringBuilder out = new StringBuilder();
                if (processTimeout) {

            }

            final int exitValue = currentProcess.exitValue();

            if (logger.isInfoEnabled()) {
                logger.info("Exit Code: {} - Process Output:\n{}", exitValue, it.getOutput());
            }
            if (exitValue == 143 && mt.isTeminated()) {
                throw new CommandExecutionException("The command execution is timeout: " + String.join(" ", commands));
            }

        stemmerOverrideService.getStemmerOverrideItem(form.dictId, form.id).ifPresent(entity -> {
            form.input = entity.getInput();
            form.output = entity.getOutput();
        }).orElse(() -> {
            throwValidationError(messages -> messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, form.getDisplayId()),
                    () -> asListHtml(form.dictId));
        });

            this.output = output;
        }

        @Override
        public void start() {
        }

        @Override
        public String getOutput() {
            return output;
        }
    }

    private static class TestSystemHelper extends SystemHelper {
        File tempFile;

        @Override

        final EditBody body = new EditBody();
        body.id = entity.getId();
        body.dictId = dictId;
        body.input = entity.getInput();
        body.output = entity.getOutput();
        return body;
    }

        final EditBody body = new EditBody();
        body.id = entity.getId();
        body.dictId = dictId;
        body.inputs = entity.getInputsValue();
        body.output = entity.getOutput();
        return body;
    }