Bug 305800 [CommonNavigator] Small tracing improvement
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptor.java
Priority p = Priority.get(priorityString);
				priority = p != null ? p.getValue()
						: Priority.NORMAL_PRIORITY_VALUE;
			} catch (NumberFormatException exception) {
				priority = Priority.NORMAL_PRIORITY_VALUE;
			}
		}
		
		 
		
		sequenceNumber = priority;
		String sortOnlyString = configElement.getAttribute(ATT_SORT_ONLY);
		sortOnly = (sortOnlyString != null && sortOnlyString.length() > 0) ? Boolean.valueOf(
				sortOnlyString).booleanValue() : false;
		
		if (id == null) {
			throw new WorkbenchException(NLS.bind(
					CommonNavigatorMessages.Attribute_Missing_Warning,
					new Object[] {
							ATT_ID,
							id,
							configElement.getDeclaringExtension()
									.getNamespaceIdentifier() }));
		}
		contribution = new IPluginContribution() {
			public String getLocalId() {
				return getId();
			}
			public String getPluginId() {
				return configElement.getDeclaringExtension().getNamespaceIdentifier();