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
/**
	 * Get the MarkerItem that matches marker.
	 * 
	 * @param marker
	 * @return MarkerItem or <code>null<code> if it cannot be found
	 */
	MarkerItem getMarkerItem(IMarker marker) {
		if (refreshingMarkers())
			return null;
		return currentMap.getMarkerItem(marker);
	}
	/**
	 * Get the name for the preferences for the receiver.
	 * 
	 * @return String
	 */
	private String getMementoPreferenceName() {
		return getClass().getName() + viewId;
	}
	/**
	 * Return the primary sort field
	 * 
	 * @return MarkerField
	 */
	MarkerField getPrimarySortField() {
		return getComparator().getPrimarySortField();
	}
	/**
	 * Get the sort direction of field
	 *