plugins.js

```js
function reducer(state, action) {
  switch (action): {
    // ...handle the different `action.type` values here
  }
}
```

The plugin for this reducer would look like this:

```js
function plugin(resourceType) {
  return function reducer(state, action) {
    // Let's make sure this plugin only modifies this slice :)
    if (resourceType !== action.resourceType) {
      return state;
    }

    switch (action): {
      // ...handle the different `action.type` values here
    }
  }
}
```