+* TODO autosearch()
+
+* TODO hideWhenNarrow()
+
+* TODO subwidget()
+
+* TODO expandValue()
+
+In addition to these properties and methods of the bare widget object,
+some kinds of specific widget add other properties of their own. For
+example, the `Builder` widget uses a `callback` property as the
+function that it use to publish the widget definition that it
+constructs. This defaults to the builtin function `alert`, but can be
+overridden by derived widgets such as `ConsoleBuilder`.
+