T - the value about to be changedpublic interface HasValueChangeHandlers<T> extends HasHandlers
ValueChangeEvent events.| Modifier and Type | Method and Description | 
|---|---|
| HandlerRegistration | addValueChangeHandler(ValueChangeHandler<T> handler)Adds a  ValueChangeEventhandler. | 
fireEventHandlerRegistration addValueChangeHandler(ValueChangeHandler<T> handler)
ValueChangeEvent handler.handler - the handler