Content License: Creative Commons Attribution Non Commercial Share Alike 4.0 International (CC-BY-NC-SA-4.0)Credit must be given to the creatorOnly noncommercial uses of the work are permittedAdaptations must be shared under the same termsDownloadsDownload 20 Polymorphism (ii) - TraitsPierrick RogerOctober 1, 202620.1 Traits20.2 Polymorphism with traits20.3 Default implementation