Is there a better way to do the following undocumented thing

I have a piece of 3rd party code with the following lines, which worked as needed in R2013b,

    hgp     = findpackage('hg');
    axesC   = findclass(hgp,'axes');

    LimListener = handle.listener(imAxes,...
                [axesC.findprop('XLim') axesC.findprop('YLim')],...
                'PropertyPostSet',@localLimitListener);

This code uses undocumented functions findpackage and findclass . Now that I've upgraded to R2014b, their behavior has changed and the code no longer works properly. In particular, findpackage('hg') now just returns empty, [] .

Was there a better way to have implemented this in R2013b, one which avoids undocumented MATLAB and which will continue to work in R2014b?

[Adam]

What does findpackage do? It seems obvious from the title, but not so obvious why it is needed over and above just using an import instruction.

[Matt J]

Adam,

Since findpackage is undocumented, I cannot know what it does or how it is different from import(). But in my Answer, I think I've found it to be unnecessary altogether.

Answer 1

[Matt J]

I think I figured it out. It can all be condensed to

    LimListener = addlistener(imAxes,{'XLim','YLim'},'PostSet',@localLimitListener);