classDiagram
        direction LR
        class Student {
          -idCard : IdCard
        }
        class IdCard{
          -id : int
          -name : string
        }
        class Bike{
          -id : int
          -name : string
        }
        Student "1" --o "1" IdCard : carries
        Student "1" --o "1" Bike : rides
    

mindmap
  root((mindmap))
    Origins
      Long history
      ::icon(fa fa-book)
      Popularisation
      ::icon(fa fa-book)
        British popular psychology author Tony Buzan
    Research
      ::icon(fa fa-book)
      On effectivness
and features
      On Automatic creation
        Uses
            Creative techniques
            Strategic planning
            Argument mapping
    Tools
      Pen and paper
      Mermaid
        

      example-diagram