}
    
    char *ZstrFindSubstringN(const char *haystack, const char *needle, size needle_len) {
        if (!haystack || !needle) {
            LOG_FATAL("Invalid arguments");

                        // Find first occurence of content between current and next format specifier or null character
                        const char *e = NULL;
                        if ((e = ZstrFindSubstringN(in, p, space_len))) {
                            fmt_info.max_read_len = e - in;
                        }

    /// FAILURE : NULL
    ///
    #define StrFindCstr(str, key, key_len) ZstrFindSubstringN((str)->data, (key), (key_len))
    
        //