Equivalent `super` keyword?

[bergel]

👋 I really like your package. Thanks for having written it.
I am left with a question, though: how would you write a super call?
Here is a non-working example:

using Classes

@class Point begin
	x
	y
end

@class mutable ColoredPoint <: Point begin
	color
end

function my_print(p::Point) 
	println("Point { x=$(p.x), y=$(p.y) }")
end

function my_print(p::ColoredPoint) 
	println("ColoredPoint { x=$(p.x), y=$(p.y), color=$(p.color) }")
end

call_my_print(p) = my_print(p)

my_value(p::Point) = 1
my_value(p::ColoredPoint) = 1 + my_value(convert(Point, p))

This last definition is ill-defined; convert(Point, p) will ultimately fail. Have you thought about a way to define super call?