document:
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    type: ul_list
    nodes:
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      type: list_item
      nodes:
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        nodes:
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        type: ul_list
        nodes:
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          type: list_item
          nodes:
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            nodes:
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          nodes:
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      type: list_item
      nodes:
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        nodes:
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selection:
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  anchorOffset: 0
  focusKey: cursor
  focusOffset: 0
  isFocused: true