In this screencast I implement and use a Mixin with
"In object-oriented programming languages, a Mixin is a class that contains methods for use by other classes without having to be the parent class of those other classes (...)":
See you at Single Page Applications (SPAs) -- the "no frameworks, no migrations" approach, at Munich Airport, Terminal 2 or webstandards.training (online).
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A book about rethinking Java EE Patterns