Error when using get method (MATLAB:cl​ass:Depend​entGet)

Consider the following Class and the short script to build the blocks of a table. The idea behind the script is that T stands for the whole table where as U and V are two subblocks, constituting the table. Why does Matlab throw this error when I query V.top?

In class 'TestComponent', the get method for Dependent property 'top' attempts to access the stored property value. Dependent properties don't store a value and can't be accessed from their get method.

Script:

T = TestComponent

U = TestComponent

V = TestComponent

T.add(U)

T.add(V)

V.top

Class:

classdef TestComponent < handle

properties

Children

previousPeer

topRoot = 1

height = 1

end

properties (Dependent)

top

end

methods

function val = get.top(obj)

if ~isempty(obj.previousPeer)

val = obj.previousPeer.top + obj.previousPeer.height;

else

val = obj.topRoot;

end

end

function add(obj,child)

if isempty(obj.Children)

obj.Children{1} = child;

else

child.previousPeer = obj.Children{end};

obj.Children{end + 1,1} = child;

end

end

end

end