---
source: varnish-macros/src/tests.rs
---
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# Varnish Module (VMOD) `tuple`
```vcl
// Place import statement at the top of your VCL file
// This loads vmod from a standard location
import tuple;
// Or load vmod from a specific file
import tuple from "path/to/libtuple.so";
```
### Function `STRING tuple.ref_to_slice_lifetime()`