> For the complete documentation index, see [llms.txt](https://davidsietz.gitbook.io/workspace/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://davidsietz.gitbook.io/workspace/module-06/06-section-02.md).

# Section II - library

> [lib.rs](https://github.com/dsietz/rust-daas/blob/master/src/lib.rs)

Since we didn't declare any new external dependencies in the `Cargo.toml` file, we don't have any new declarations in the `lib.rs` file. However, we do need to add the *data\_services* module to our library, we declare it at the bottom of our `src/lib.rs` file, (after the processor module).

```
pub mod data_service;
```