If I understand you correctly you are talking about a dispose mechanism, which will remove the widget from the page. Currently it is not available out-of-the-box, we may include it in the future.
What you can do now is unbind
all existing event handlers from all elements of a widget and then remove
it from the DOM. In some causes you may want to unwrap
a widget element from its additionally added parents, e.g. as is the case with ComboBoxes and DatePickers.
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