Here’s a really simple method to access your Document class from anywhere in a project. This method will only work if that Class is instanced only once.
Add a public static var to the class, which in this example is name “Main”:
public static var main:Main;
Set the value for the new variable to reference your class instance with “this”:
main = this;
From here you can access any public method or property of the Main class with:
Main.main.method();