Prefer Composition Over Inheritance
Languages like Go does not have the mechanism of inheritance, nevertheless they are object-oriented, given that objects are composed of several behaviors or traits.
Scala advocates for similar approach.
The crucial difference is that one composes traits instead of inheriting class-methods from superclasses. This makes hierarchies more flat and wide, which means more branches, which provides a better encapsulation (less sharing).
The metaphor is use (compose) only what is needed.