document:
  nodes:
    - object: block
      type: paragraph
      nodes:
        - object: text
          leaves:
            - text: Hello
    - object: block
      type: paragraph
      nodes:
        - object: text
          leaves:
            - text: ''
        - object: inline
          isVoid: true
          type: math
          data:
            tex: |-

              a = b
        - object: text
          leaves:
            - text: ''
    - object: block
      type: paragraph
      nodes:
        - object: text
          leaves:
            - text: world