What is a simple way to have multiple inner classes mutually refer to each other?

Question

Suppose I have code like this:

class Class1:
    var pie

class Class2:
    func blah():
        return Class1.new()

This works fine and Class2 can refer to Class1. However, the following doesn't work:

class Class1:
    func blah():
        return Class2.new()

class Class2:
    func blah():
        return Class1.new()

because Class2 has not been declared when Class1 refers to it. What is a simple way to get them to be able to refer to each other?

Comments

I don't think that plugin lends itself well to parameterized states, since it uses nodes for states, and parameterizing nodes requires the ugly hack of setting its parameters after creating them. It also makes it hard to have states that have another state nested inside of them (e.g. a menu state that holds a reference to the state the game was in before the menu was entered).

---

class Class1:
    func blah():
        return Class2.new()

class Class2:
    func blah():
        return Class1.new()

var Class2 = Class2
var Class1 = Class1

---

That doesn't work, for multiple reasons. The Class2 var comes after Class1's definition where it's needed, and inner classes can't access vars of the outer class (since vars can't be made static, vars need an instance to be part of).

---

I wasn't sure it would work either... that's why I commented -_-

How about this?

class Class1:
    var Class2
    func blah():
        return Class2.new()

class Class2:
    Class1
    func blah():
        return Class1.new()

func _ready():
    Class1.Class2 = Class2
    Class2.Class1 = Class1

---

That doesn't work either because Godot has no static variables.