Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/dnd/CommonDropAdapterDescriptor.java
INavigatorContentExtPtConstants {
	private IConfigurationElement element;
	private Expression dragExpr;
	private Expression dropExpr;
	CommonDropAdapterDescriptor(
			IConfigurationElement aConfigElement) {
		element = aConfigElement;
		init();
	}
	private void init() {