2021-09-22

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  @startuml
  abstract        Animal
  interface       Color
  interface       Gender
  Animal <|--	Pig
  Animal <|--	Dog
  Animal <|--	Cat
  Pig    <|--	Piggy
  Dog    <|--     Doggy
  Cat    <|--     Kitten
  Color  <|..     Cat
  Gender <|..     Cat
  @enduml