protected final void arrayCopy(int srcPos, char[] dest, int destPos, int length) {
        text.getChars(srcPos, srcPos + length, dest, destPos);
    }
The value of a literal token, recorded as a string. For integers, leading 0x and 'l' suffixes are suppressed.
src/main/java/com/alibaba/fastjson/parser/JSONScanner.java