Google's common expression language supports bytes literal, which I think is a good function. I hope spring expression can also expand this capability

b"\x61\X62\X63" will be resolved to abc b"abc\x61\x62\x63" will be resolved to abcabc

prefix:b' or b" suffix: ' or "

Reference: https://github.com/google/cel-spec/blob/master/doc/langdef.md

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