/**
  * Sets this editor's IObservableValue associated to the widget property
  *
  * @param widgetObservable
  * @param targetToModel the IConverter to convert data from Widget to Model
  * @param modelToTarget the IConverter to convert data from Model to Widget
  */
 protected void setWidgetObservable(
     IObservableValue widgetObservable, IConverter targetToModel, IConverter modelToTarget) {
   this.widgetObservable = widgetObservable;
   setConverters(targetToModel, modelToTarget);
 }