code: @Override
  	public void setValue(ELContext context, Object base, Object property, Object value) {
  		if (context == null) {
  			throw new NullPointerException("context is null");
  		}
  		if (isResolvable(base)) {
  			throw new PropertyNotWritableException("resolver is read-only");
  		}
  	}
docs: If the base object is a ResourceBundle, throw a {@link PropertyNotWritableException}.
  
  @param context
  The context of this evaluation.
  @param base
  The bundle to analyze. Only bases of type ResourceBundle are handled by this
  resolver.
  @param property
  The name of the property to analyze. Will be coerced to a String.
  @param value
  The value to be set.
  @throws NullPointerException
  if context is null.
  @throws PropertyNotWritableException
  Always thrown if base is an instance of ResourceBundle.