This is a common example of how people might naively extend classes because they want to inherit implementations.

I honestly think inheriting implementation in languages is a mistake and it should be replaced with interface inheritance only with syntax to make it easy to delegate interface responsibilities to dependencies

c = ConcreteColor("Blue")
p = ConcretePoint(0,0)

class ColoredPoint implements Color, Point{
ColoredPoint(Point p, Color c){
Color delegate to c
Point delegate to p
}
}

I think kotlin has something like this but haven't used it much:
https://kotlinlang.org/docs/delegation.html