document:
  nodes:
    - object: block
      type: paragraph
      nodes:
        - object: text
          leaves:
            - text: 'Blah blah'

    - object: block
      type: ul_list
      data:
        style:
          listStyleType: 'disc'
      nodes:

        - object: block
          type: list_item
          nodes:
            - object: block
              type: paragraph
              nodes:
                - object: text
                  leaves:
                    - text: 'First item'
            - object: block
              type: ul_list
              nodes:
                - object: block
                  type: list_item
                  nodes:
                    - object: block
                      type: paragraph
                      nodes:
                        - object: text
                          leaves:
                            - text: 'Subitem'

        - object: block
          type: list_item
          nodes:
            - object: block
              type: paragraph
              nodes:
                - object: text
                  leaves:
                    - text: 'Second item'

        - object: block
          type: list_item
          nodes:
            - object: block
              type: paragraph
              nodes:
                - object: text
                  leaves:
                    - text: 'Blah blah'