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doc: add an example code #35625

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6 changes: 6 additions & 0 deletions doc/api/process.md
Expand Up @@ -1342,6 +1342,12 @@ The `process.getgroups()` method returns an array with the supplementary group
IDs. POSIX leaves it unspecified if the effective group ID is included but
Node.js ensures it always is.

```js
if (process.getgroups) {
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console.log(process.getgroups()); // [ 16, 21, 297 ]
}
```

This function is only available on POSIX platforms (i.e. not Windows or
Android).

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