public AnimalOrderSpecification(AnimalOrder @animalOrder)
 {
     _animalOrder = @animalOrder;
 }
 public IAnimalOrderAndTypeSpecification(AnimalClass animalClass, AnimalOrder animalOrder)
 {
     _animalClass = animalClass;
     _animalOrder = animalOrder;
 }
 public AnimalClassAndOrderSpecification(AnimalClass @animalClass, AnimalOrder @animalOrder)
 {
     _animalClass = @animalClass;
     _animalOrder = @animalOrder;
 }