Bug 163345 [Field Assist] - API - Deprecate DecoratedField and related classes
If ControlDecoration is adopted in replacement of DecoratedField by all existing SDK clients, then we should deprecate DecoratedField.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/DecoratedField.java
* 
	 * @param decoration
	 *            the decoration to be hidden.
	 */
	public void hideDecoration(FieldDecoration decoration) {
		FieldDecorationData data = getDecorationData(decoration);
		if (data == null) {
			return;
		}
		
		
		
		data.visible = false;
		setVisible(data, false);
	}
	/**
	 * Update the specified decoration. This message should be used if the image
	 * or description in the decoration have changed. This message has no
	 * immediate effect if the decoration is not visible, and no effect at all
	 * if the decoration was not previously added to the field.
	 * 
	 * @param decoration
	 *            the decoration to be hidden.
	 */
	public void updateDecoration(FieldDecoration decoration) {
		FieldDecorationData data = getDecorationData(decoration);
		if (data == null) {
			return;
		}
		if (data.label != null) {