Bug 132763 [Markers] Unused NLS messages reported on startup using I0321-1210
Starting I20060321-1210, I got this in the console log. !ENTRY org.eclipse.osgi 2 1 2006-03-21 20:21:07.984 !MESSAGE NLS unused message: filtersDialog_selectAllTypes in: org.eclipse.ui.views.markers.internal.messages !ENTRY org.eclipse.osgi 2 1 2006-03-21 20:21:07.984 !MESSAGE NLS unused message: filtersDialog_deselectAllTypes in: org.eclipse.ui.views.markers.internal.messages
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/DialogMarkerFilter.java
*/
		public abstract boolean isCategory();
	}
	/**
	 * MarkerTypeNode is the wrapper for marker types.
	 * 
	 */
	private class MarkerTypeNode extends AbstractNode {
		MarkerType type;
		MarkerCategory category;
		/**
		 * Create an instance of the receiver wrapping markerType.
		 * 
		 * @param markerType
		 */
		public MarkerTypeNode(MarkerType markerType) {
			type = markerType;
			nodeToTypeMapping.put(markerType.getId(), this);
		}
		/**
		 * Set the category of the receiver.
		 * 
		 * @param category
		 */
		public void setCategory(MarkerCategory category) {
			this.category = category;
		}
		/**
		 * Get the category for the receiver.
		 *