document:
  nodes:
    - object: block
      type: paragraph
      nodes:
      - object: text
        leaves:
          - text: 'First item'

    - object: block
      type: paragraph
      nodes:
      - object: text
        leaves:
          - text: 'Second item, with nested list'
    - object: block
      type: ol_list
      nodes:
      - object: block
        type: list_item
        nodes:
        - object: block
          type: paragraph
          nodes:
          - object: text
            leaves:
              - text: 'First item in the nested list'
      - object: block
        type: list_item
        nodes:
        - object: block
          type: paragraph
          nodes:
          - object: text
            leaves:
              - text: 'Second item in the nested list'

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