"type": "Hardcover",
            "pages": 302
        },
        {
            "year": 2011,
            "publisher": "Harper Collins",
            "type": "Paperback",
            "pages": 265
        }
    ]
}
{
    "title": "The Robots of Dawn",
    "authorInfo": {
        "name": "Isaac Asimov",
        "yearRange": [1920, 1992],
        "penName": "Paul French"

        return fetch_details_from_external_service(isbn, id, headers)
    end

    return {
        'id' => id,
        'author': 'William Shakespeare',
        'year': 1595,
        'type' => 'paperback',
        'pages' => 200,
        'publisher' => 'PublisherA',
        'language' => 'English',
        'ISBN-10' => '1234567890',
        'ISBN-13' => '123-1234567890'
    }
end

      year:
        type: "integer"
        format: "int32"
        description: "Year the book was first published in"
      type:
        type: "string"
        enum:
          - "paperback"
          - "hardcover"
        description: "Type of the book"
      pages:
        type: "integer"
        format: "int32"
        description: "Number of pages of the book"
    required:
    - "id"

 *
 * <pre>
 * interface Book {...}
 * public class Books {
 *   public static Book hardcover(String title) {...}
 *   public static Book paperback(String title) {...}
 * }
 * </pre>
 *
 * <p>please use {@link ClassSanityTester#forAllPublicStaticMethods}.
 *
 * <p>If not all classes on the classpath should be covered, {@link #ignoreClasses} can be used to

 *
 * <pre>
 * interface Book {...}
 * public class Books {
 *   public static Book hardcover(String title) {...}
 *   public static Book paperback(String title) {...}
 * }
 * </pre>
 *
 * <p>please use {@link ClassSanityTester#forAllPublicStaticMethods}.
 *
 * <p>If not all classes on the classpath should be covered, {@link #ignoreClasses} can be used to

 * factory classes like:
 *
 * <pre>
 * interface Book {...}
 * public class Books {
 *   public static Book hardcover(String title) {...}
 *   public static Book paperback(String title) {...}
 * }
 * </pre>
 *
 * <p>And all the created {@code Book} instances can be tested with:
 *
 * <pre>
 * new ClassSanityTester()
 *     .forAllPublicStaticMethods(Books.class)

 * factory classes like:
 *
 * <pre>
 * interface Book {...}
 * public class Books {
 *   public static Book hardcover(String title) {...}
 *   public static Book paperback(String title) {...}
 * }
 * </pre>
 *
 * <p>And all the created {@code Book} instances can be tested with:
 *
 * <pre>
 * new ClassSanityTester()
 *     .forAllPublicStaticMethods(Books.class)