document:
  nodes:
    - kind: block
      type: ul_list
      nodes:
        - kind: block
          type: ul_list
          nodes:
            - kind: block
              type: list_item
              nodes:
                - kind: block
                  type: list_item
                  nodes:
                    - kind: block
                      type: paragraph
                      nodes:
                        - kind: text
                          key: 'start'
                          text: '1st item'

selection:
  anchorKey: 'start'
  anchorOffset: 2
  focusKey: 'end'
  focusOffset: 4
  isFocused: true