Parent/child construction to have the possibility to retrieve info from the superclass object in the subclass object

Dear all,

Suppose an object MainObj has been declared that has two variables of which one is also an object "SubObj"

if I would call a function of SubObj, "DoSomething", how could I retrieve the upper-level MainObj?

Maybe the Parent/Child contruction would work but how should I construct my objects/classes?

many thanks!

Kees

%% separate file with MainObj
classdef MainObj < handle
    properties (SetObservable)
        variable1 = [];
        variable2 = [];
    end
    
    methods
        function obj = MainObj()
            obj.variable1  = SubObj();
        end
    end
end

%% separate file with SubObj
classdef SubObj < handle
    properties (SetObservable)
        subvariable = [];
    end;
    methods
        function DoSomething(obj)
            obj.subvariable = 10;
            % How could I retrieve the Parent object of "obj" 
            % for example, something like this:
            ParentObject = get(obj, 'Parent');
            ParentObject.variable2 = 1;
        end;
    end;
end