The following snippet causes a lot of tests to fail, but is not relevant anymore:

The code was embedded in this context:

    %immediately elide prefix all property names with this but only if there are
    %no typed objects in it.
    propnames = keys(props);
    if hasTypes
        parsed = containers.Map({root}, {props});
    else
        parsed = containers.Map;
        for i=1:length(propnames)
            pnm = propnames{i};
            p = props(pnm);
            parsed([root '_' pnm]) = p;
        end
    end
    
    if isempty(parsed)
        %special case where a directory is simply empty.  Return itself but
        %empty
        parsed(root) = [];
    end

It was possible to create a containers.Map object named parsed that was empty, but parsed was later changed (see below) to be a types.untyped.Set which per definition (ref this PR) can not be empty (unless specifically created with types.untyped.Set.empty)

Code coverage also shows that lines are not covered by tests. Will remove this part

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.95%. Comparing base (5aa27d9) to head (6bcafd2).

@@            Coverage Diff             @@
##           master     #616      +/-   ##
==========================================
+ Coverage   90.91%   90.95%   +0.04%     
==========================================
  Files         107      107              
  Lines        4753     4752       -1     
==========================================
+ Hits         4321     4322       +1     
+ Misses        432      430       -2     

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