Bug 270008 [CommonNavigator] Ability to extend bindings beyond "inheritsBindingsFrom" tag
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorViewerDescriptor.java
}
	}
	/**
	 * @param descriptor
	 *            A non-null descriptor to add
	 */
	 void addDragAssistant(CommonDragAssistantDescriptor descriptor) {
		getDragAssistants().add(descriptor);
	}
	/**
	 * 
	 * @return The set of {@link CommonDragAssistantDescriptor}s for this
	 *         viewer.
	 */
	public Set getDragAssistants() {
		if (dragAssistants == null) {
			dragAssistants = new HashSet();
		}
		return dragAssistants;
	}
	private void consumeBinding(IConfigurationElement element, boolean isContent) {
		IConfigurationElement[] includesElement = element
				.getChildren(TAG_INCLUDES);
		if (includesElement.length == 1) {
			if (isContent) {
				contentBinding.consumeIncludes(includesElement[0], true);
			} else {
				actionBinding.consumeIncludes(includesElement[0], false);
			}
		} else if (includesElement.length >= 1) {