addStyle fails to change tree appearance

I am attempting to programmatically change the background color of certain tree nodes based on the state of something else in my Matlapp. I found the documentation for uiStyle and addStyle, so I started to play with the minimal examples. However, the posted example code on these pages does not actually work:

fig = uifigure('Position',[100 100 250 350]);
t = uitree(fig);
fignode = uitreenode(t,'Text','UI Figure');
pnlnode = uitreenode(fignode,'Text','Panel');
axnode = uitreenode(fignode,'Text','UIAxes');
btnnode = uitreenode(pnlnode,'Text','Button');
ddnode = uitreenode(pnlnode,'Text','DropDown');
expand(t,'all')
s1 = uistyle('BackgroundColor','#3773EB');
s2 = uistyle('BackgroundColor','#78A1F2');
s3 = uistyle('BackgroundColor','#B5CBF8');

addStyle(t,s1,'level',1);
addStyle(t,s2,'level',2);
addStyle(t,s3,'level',3);

Returns an error:

Check for incorrect argument data type or missing argument in call to function 'addStyle'.
Error in test (line 74) addStyle(t,s1,'level',1);

Using lasterror gives: ans =

struct with fields:

       message: 'Cannot access method 'getController' in class 'matlab.ui.container.Tree'.'
    identifier: 'MATLAB:class:MethodRestricted'
         stack: [6×1 struct]

Example code that uses tables instead of trees works fine. But for my application, I need to use a tree to display my data.

What is going on, and can I overcome this error without switching to a newer version of Matlab?

Answer 1

[Thomas Carlson]

This problem seems to be fixed in R2022a.