}

    String getSupportedUploadedJsExtentions();

    default String[] getSupportedUploadedJsExtentionsAsArray() {
        return split(getSupportedUploadedJsExtentions(), ",")
                .get(stream -> stream.filter(StringUtil::isNotBlank).toArray(n -> new String[n]));
    }

     * comment: Supported JavaScript file extensions for upload.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getSupportedUploadedJsExtentions();

    /**
     * Get the value for the key 'supported.uploaded.css.extentions'. <br>
     * The value is, e.g. css <br>
     * comment: Supported CSS file extensions for upload.