What does a report mean that says "1 resolved, 1 installed"?

I'm seeing the following (verbose) report for one of my projects, and I'm not sure how to interpret it:

```
react-router-dom (Found 1 resolved, 1 installed, 1 depended. Latest 5.1.2.)
5.1.2
path/to/my-project/~/react-router-dom
* Dependency graph
my-project@1.0.0 -> react-router-dom@^5.0.1
* Duplicated files in main.js
react-router-dom/esm/react-router-dom.js (S, 9997)
```

My best guess would be that it means I don't actually have any duplicated packages (hence 1,1,1), but that somehow I'm consuming the same package twice in different ways. Is that possible? Could I somehow be consuming it once as CJS and once as ESM, and that's what Inspectpack is picking up on?

I'm using the `DuplicatesPlugin` in my dev Webpack configuration, so `main.js` is the output from webpack-dev-server. I see similar reports for other libraries, not just `react-router-dom`.

Many thanks (and thanks for putting this tool together!)