normalize(json) {
    return json;
  }
This method is used by the POST and PUT shorthands. These shorthands expect a valid JSON:API document as part of the request, so that they know how to create or update the appropriate resouce. The *normalize* method allows you to transform your request body into a JSON:API document, which lets you take advantage of the shorthands when you otherwise may not be able to.

    Note that this method is a noop if you're using JSON:API already, since request payloads sent along with POST and PUT requests will already be in the correct format.

    Take a look at the included `ActiveModelSerializer`'s normalize method for an example.

    @method normalize
    @param json
    @public