return source;
    }

    /**
     * Adds a rewrite rule for document settings.
     *
     * @param rule the rewrite rule to apply to document settings
     */
    public void addDocumentSettingRewriteRule(final UnaryOperator<String> rule) {
        docSettingRewriteRuleList.add(rule);
    }

    /**
     * Gets the resource path for configuration files, checking type-specific variants first.
     *