Bug 93400 LTK UI should provide official API for structural content in the preview page
org.eclipse.ltk.ui.refactoring/src/org/eclipse/ltk/internal/ui/refactoring/TextEditChangeElement.java
}
				viewer.setInput(input);
			}
		} else {
			viewer.setInput(null);
		}
	}
	
	/* non Java-doc
	 * @see ChangeElement#setActive
	 */
	public void setEnabled(boolean enabled) {
		fChangeGroup.setEnabled(enabled);
	}
	
	public void setEnabledShallow(boolean enabled) {
		fChangeGroup.setEnabled(enabled);
	}
	
	/* non Java-doc
	 * @see ChangeElement.getActive
	 */
	public int getActive() {
		return fChangeGroup.isEnabled() ? ACTIVE : INACTIVE;
	}
	
	/* non Java-doc
	 * @see ChangeElement.getChildren
	 */
	public ChangeElement[] getChildren() {