/sandbox

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    id1["`**Root** with
a second [line](https://google.com)
Unicode works too: 🤓`"]
    Origins
      Long history
      ::icon(fa fa-book)
      Popularisation
        British popular author Tony Buzan
    Research
      On effectiveness<br/>and features
      On Automatic creation
        Uses
            Creative techniques
            Strategic planning
            Argument mapping
    Tools
      Pen and paper
      Mermaid
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