interface ISomething {
	value int
	get_value_implemented(s &ISomething) int
}

struct SomethingImplemented {
	value int
}

fn (s SomethingImplemented) get_value_implemented(s_ &ISomething) int {
	return s.value
}

fn get_value_implemented(s &ISomething) int {
	return s.value
}

struct SomethingNotImplemented {
	value int
}

fn get_value_not_implemented(s &SomethingNotImplemented) int {
	return s.value
}

fn main() {
	s1 := &SomethingImplemented{
		value: 1
	}
	// fn call
	_ := get_value_implemented(&s1)
	// method call
	_ := s1.get_value_implemented(&s1)

	s2 := &SomethingNotImplemented{
		value: 1
	}
	// fn call
	_ := get_value_not_implemented(&s2)
}