In which file is constraint decoding implemented?

[estuday]

Checklist

• 1. I have searched related issues but cannot get the expected help.
• 2. The bug has not been fixed in the latest version.
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Describe the bug

Hi,
I would like to know in which file the constraint decoding is implemented.
In outlines, constraint decoding is implemented by passing fsm into the logits_processers parameter of the generate method. I see that sgl also relies on outlines. Is the implementation logic the same?

Reproduction

none

Environment

none

[merrymercy]

https://github.com/sgl-project/sglang/tree/main/python/sglang/srt/constrained