Bug 264818 [Markers] Problems view: Status line shows wrong selection count summary
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/CachedMarkerBuilder.java
*/
	private boolean refreshingMarkers() {
		if (currentMap == null) {
			scheduleMarkerUpdate();
			return true;
		}
		return building;
	}
	/**
	 * Restore the pre-3.4 filters.
	 * 
	 * @param memento
	 */
	private void restoreLegacyFilters(IMemento memento) {
		IMemento[] sections = null;
		if (memento != null)
			sections = memento.getChildren(TAG_LEGACY_FILTER_ENTRY);
		for (int i = 0; i < sections.length; i++) {
			IMemento child = sections[i];
			String id = child.getString(IMemento.TAG_ID);
			if (id == null)
				continue;
			loadLegacyFilter(child);
		}
	}
	/**
	 * Save the state of the receiver to memento
	 * 
	 * @param memento
	 * @param displayedFields -