getVariableName

...
finder = slreportgen.finder.ModelVariableFinder(model);

while hasNext(finder)
    result = next(finder);
    
    % Get the ModelVariable reporter for the result
    % Get the variable name
    reporter = getReporter(result);
    name = getVariableName(reporter);
    ...
    % Add the reporter to the chapter
    add(chapter,reporter);
end
...