Bug 305800 [CommonNavigator] Small tracing improvement
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptor.java
private IConfigurationElement configElement;
	private int priority = Priority.NORMAL_PRIORITY_VALUE;
	/**
	 * This is calculated based on the priority and appearsBeforeId when all of the descriptors
	 * are first loaded. This is what's used to sort on after that.
	 */
	private int sequenceNumber;
	
	private String appearsBeforeId;
	private Expression enablement;
	private Expression possibleChildren;
	private Expression initialActivation;
	
	private String icon;
	private boolean activeByDefault;
	private IPluginContribution contribution;
	private boolean sortOnly;
	
	private Set overridingExtensions;
	private List overridingExtensionsList; 
	private OverridePolicy overridePolicy;
	private String suppressedExtensionId;
	private INavigatorContentDescriptor overriddenDescriptor;
	private int hashCode = HASH_CODE_NOT_COMPUTED;
	private boolean providesSaveables;
	/**
	 * Creates a new content descriptor from a configuration element.
	 * 
	 * @param configElement
	 *            configuration element to create a descriptor from