Bug 287621 [CommonNavigator] Add more tracing
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/Policy.java
public static final boolean DEFAULT = false;
	/**
	 * Option for tracing the reading and setup of the extensions
	 */
	public static boolean DEBUG_EXTENSION_SETUP = DEFAULT;
	/**
	 * Option for tracing extension resolution
	 */
	public static boolean DEBUG_RESOLUTION = DEFAULT;
	/**
	 * Option for tracing drag and drop
	 */
	public static boolean DEBUG_DND = DEFAULT;
	/**
	 * Option for tracing viewer/content descriptor association map
	 */
	public static boolean DEBUG_VIEWER_MAP = DEFAULT;
	static {
		if (getDebugOption("/debug")) { 
			DEBUG_EXTENSION_SETUP = getDebugOption("/debug/setup"); 
			DEBUG_RESOLUTION = getDebugOption("/debug/resolution"); 
			DEBUG_DND = getDebugOption("/debug/dnd"); 
			DEBUG_VIEWER_MAP = getDebugOption("/debug/viewermap"); 
		}
	}
	private static boolean getDebugOption(String option) {
		return "true".equalsIgnoreCase(Platform.getDebugOption(NavigatorPlugin.PLUGIN_ID + option)); 
	}
}