Bug 183890 [DataBinding] Default converter for numbers to numbers
We don't currently default converters for converting between numbers (e.g. int to double, long to int, etc.).
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/core/tests/databinding/UpdateValueStrategyTest.java
IValidator validator;
		
		protected void fillDefaults(IObservableValue source,
				IObservableValue destination) {
			super.fillDefaults(source, destination);
		}
		
		/* (non-Javadoc)
		 * @see org.eclipse.core.databinding.UpdateValueStrategy#createValidator(java.lang.Object, java.lang.Object)
		 */
		protected IValidator createValidator(Object fromType, Object toType) {
			validator = super.createValidator(fromType, toType);
			return validator;
		}
	}
}