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You may wonder why the show() method returns a HttpHeades HttpHeaders object and the update() method returns the expected result code String. Well, the Rest Plugin adds in support for action methods that return RestInfo objects as a way for the action to have more control over the response. In this example, we wanted to ensure the response included the ETag header and a last modified date so that the information will be cached properly by the client. The RestInfo object is a convenient way to control the response in a type-safe way.

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