Joseph B. Axenroth

Sorry, my explanation was probably convoluted. The specific code that I'm using for this has the material-tree HTML instantiated [here](https://github.com/jbaxe2/plato.angular/blob/master/lib/src/archives/course/archive_course_component.html#L33). It makes use of the options, componentRenderer, and expandFirst attributes....

If you use the Angular Components example, on the material tree demo options file, line 63: [https://github.com/dart-lang/angular_components_example/blob/master/example/material_tree_example/lib/src/material_tree_demo_options.dart#L63](https://github.com/dart-lang/angular_components_example/blob/master/example/material_tree_example/lib/src/material_tree_demo_options.dart#L63) Add 'Testing Film' (or some String not already a category or title in...