private static boolean isEndOfJson(StringBuilder builder, int pos) {
        return builder.charAt(pos) == '"' && builder.charAt(pos - 1) != '\\';
    }
whether data is end of json

@param builder raw data
@param pos the position of raw data
@return true or false
inlong-common/src/main/java/org/apache/inlong/common/util/MaskDataUtils.java