`responsive_design_width`. Should be used for "unimportant"
widgets that can be omitted from the mobile version of a site.
-* TODO subwidget()
+* `expandValue()` --
+ TODO: either document this or remove it from the API.
-* TODO expandValue()
+* TODO subwidget()
In addition to these properties and methods of the bare widget object,
some kinds of specific widget add other properties of their own. For