keyForModel(modelName) {
    return camelize(modelName);
  }
Used to define a custom key when serializing a primary model of modelName *modelName*. For example, the default Serializer will return something like the following:

    ```
    GET /blogPosts/1

    {
      blogPost: {
        id: 1,
        title: 'Lorem ipsum'
      }
    }
    ```

    If your API uses hyphenated keys, you could overwrite `keyForModel`:

    ```js
    // serializers/application.js
    export default Serializer.extend({
      keyForModel(modelName) {
        return hyphenate(modelName);
      }
    });
    ```

    Now the response will look like

    ```
    {
      'blog-post': {
        id: 1,
        title: 'Lorem ipsum'
      }
    }
    ```

    @method keyForModel
    @param modelName
    @public