document:
  nodes:
    - object: block
      type: x-method
      nodes:
        - object: block
          type: paragraph
          nodes:
            - object: text
              leaves:
                - text: Method 1
        - object: block
          type: x-sample
          data:
            lang: js
          nodes:
            - object: block
              type: paragraph
              nodes:
                - object: text
                  leaves:
                    - text: Some code
            - object: block
              type: x-youtube
              isVoid: true
              data:
                src: https://www.youtube.com/watch?v=XXXXXXX