} else {
                this.queryString = queryString;
            }
        } else {
            this.queryString = queryString;
        }
        if (StringUtil.isBlank(this.queryString)) {
            this.queryString = "*";
        }
        if (isQuery) {
            LaRequestUtil.getOptionalRequest().ifPresent(request -> {
                highlightedQuerySet = new HashSet<>();

            final int c = bomIn.read(b);

            if (c == -1) {
                return encoding;
            }

            final String head = new String(b, 0, c, encoding);
            if (StringUtil.isBlank(head)) {
                return encoding;
            }
            final Matcher matcher = getEncodingPattern().matcher(head);
            if (matcher.find()) {
                final String enc = matcher.group(1);

the body of any nested function.
</p>


<h3 id="Blank_identifier">Blank identifier</h3>

<p>
The <i>blank identifier</i> is represented by the underscore character <code>_</code>.
It serves as an anonymous placeholder instead of a regular (non-blank)
identifier and has special meaning in <a href="#Declarations_and_scope">declarations</a>,

        final ProcessHelper processHelper = ComponentUtil.getProcessHelper();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        if (StringUtil.isBlank(filename)) {
            throw new JobProcessingException("Python script is not specified.");
        }

        cmdList.add(fessConfig.getPythonCommandPath());

        cmdList.add(getPyFilePath());

            if ("field".equals(qName)) {
                fieldName = attributes.getValue("name");
                if (StringUtil.isBlank(fieldName)) {
                    fieldName = null;
                }
                buffer.setLength(0);
            } else if ("list".equals(qName)) {

	} else {
		introMsg += color.Bold(err.Error())
	}
	renderedTxt += color.Red(introMsg) + "\n"
	// Add action message
	if uiErr.action != "" {
		renderedTxt += "> " + color.BgYellow(color.Black(uiErr.action)) + "\n"
	}
	// Add hint
	if uiErr.hint != "" {
		renderedTxt += color.Bold("HINT:") + "\n"
		renderedTxt += "  " + uiErr.hint
	}
	return renderedTxt

                }
                queryBuf.append(')');
            }
        }));

        final String baseQuery = queryBuf.toString().trim();
        if (StringUtil.isBlank(sortField)) {
            return baseQuery;
        }
        return baseQuery + " sort:" + sortField;
    }

    protected void appendQuery(final StringBuilder queryBuf, final String query) {

        String title = DocumentUtil.getValue(document, fessConfig.getIndexFieldTitle(), String.class);
        if (StringUtil.isBlank(title)) {
            title = DocumentUtil.getValue(document, fessConfig.getIndexFieldFilename(), String.class);
            if (StringUtil.isBlank(title)) {
                title = DocumentUtil.getValue(document, fessConfig.getIndexFieldUrl(), String.class);
            }
        }

            if (f.equals(field)) {
                return true;
            }
        }
        return false;
    }

    public boolean isFacetField(final String field) {
        if (StringUtil.isBlank(field)) {
            return false;
        }
        boolean flag = false;
        for (final String f : facetFields) {
            if (field.equals(f)) {
                flag = true;
            }

        final ThumbnailQueueBhv thumbnailQueueBhv = ComponentUtil.getComponent(ThumbnailQueueBhv.class);
        thumbnailQueueBhv.selectList(cb -> {
            if (StringUtil.isBlank(fessConfig.getSchedulerTargetName())) {
                cb.query().setTarget_Equal(Constants.DEFAULT_JOB_TARGET);
            } else {