text: 
  class Setosa(IrisAbstract):
      def __init__(self, sepal_length: float, sepal_width: float,
                   petal_length: float, petal_width: float) -> None:
          ...
  
      def mean(self) -> float:
          ...
  
      def sum(self) -> float:
          ...
  
      def len(self) -> int:
          ...
  